Search a number
-
+
61230 = 23513157
BaseRepresentation
bin1110111100101110
310002222210
432330232
53424410
61151250
7343341
oct167456
9102883
1061230
1142004
122b526
1321b40
1418458
1513220
hexef2e

61230 has 32 divisors (see below), whose sum is σ = 159264. Its totient is φ = 14976.

The previous prime is 61223. The next prime is 61231. The reversal of 61230 is 3216.

It is a super-2 number, since 2×612302 = 7498225800, which contains 22 as substring.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 61230.

It is not an unprimeable number, because it can be changed into a prime (61231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312 + ... + 468.

It is an arithmetic number, because the mean of its divisors is an integer number (4977).

261230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79632).

61230 is an abundant number, since it is smaller than the sum of its proper divisors (98034).

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

61230 is a wasteful number, since it uses less digits than its factorization.

61230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 61230 is about 247.4469640145. The cubic root of 61230 is about 39.4143848803.

Adding to 61230 its reverse (3216), we get a palindrome (64446).

The spelling of 61230 in words is "sixty-one thousand, two hundred thirty".

Divisors: 1 2 3 5 6 10 13 15 26 30 39 65 78 130 157 195 314 390 471 785 942 1570 2041 2355 4082 4710 6123 10205 12246 20410 30615 61230