Search a number
-
+
145544 = 23723113
BaseRepresentation
bin100011100010001000
321101122112
4203202020
514124134
63041452
71144220
oct434210
9241575
10145544
119a393
1270288
1351329
143b080
152d1ce
hex23888

145544 has 32 divisors (see below), whose sum is σ = 328320. Its totient is φ = 59136.

The previous prime is 145543. The next prime is 145547. The reversal of 145544 is 445541.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (145543) 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, 1232 + ... + 1344.

It is an arithmetic number, because the mean of its divisors is an integer number (10260).

2145544 is an apocalyptic number.

145544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164160).

145544 is an abundant number, since it is smaller than the sum of its proper divisors (182776).

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

145544 is a wasteful number, since it uses less digits than its factorization.

145544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 145 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 145544 is about 381.5022935711. The cubic root of 145544 is about 52.6014967744.

145544 divided by its sum of digits (23) gives a triangular number (6328 = T112).

The spelling of 145544 in words is "one hundred forty-five thousand, five hundred forty-four".

Divisors: 1 2 4 7 8 14 23 28 46 56 92 113 161 184 226 322 452 644 791 904 1288 1582 2599 3164 5198 6328 10396 18193 20792 36386 72772 145544