Search a number
1230 = 23541
BaseRepresentation
bin10011001110
31200120
4103032
514410
65410
73405
oct2316
91616
101230
11a19
12866
13738
1463c
15570
hex4ce

1230 has 16 divisors (see below), whose sum is σ = 3024. Its totient is φ = 320.

The previous prime is 1229. The next prime is 1231. The reversal of 1230 is 321.

1230 = 162 + 172 + ... + 192.

It is an interprime number because it is at equal distance from previous prime (1229) and next prime (1231).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

1230 is an undulating number in base 9.

It is a plaindrome in base 16.

It is a nialpdrome in base 6 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10 + ... + 50.

It is an arithmetic number, because the mean of its divisors is an integer number (189).

21230 is an apocalyptic number.

1230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512).

1230 is an abundant number, since it is smaller than the sum of its proper divisors (1794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1230 is a wasteful number, since it uses less digits than its factorization.

1230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 1230 is about 35.0713558335. The cubic root of 1230 is about 10.7144126969.

Adding to 1230 its reverse (321), we get a palindrome (1551).

Subtracting from 1230 its reverse (321), we obtain a palindrome (909).

It can be divided in two parts, 1 and 230, that added together give a triangular number (231 = T21).

The spelling of 1230 in words is "one thousand, two hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 41 82 123 205 246 410 615 1230