145557 has 12 divisors (see below), whose sum is σ = 218400. Its totient is φ = 96876.

The previous prime is 145549. The next prime is 145577. The reversal of 145557 is 755541.

It is not a de Polignac number, because 145557 - 2³ = 145549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 145557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57 + ... + 542.

It is an arithmetic number, because the mean of its divisors is an integer number (18200).

2¹⁴⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

145557 is a deficient number, since it is larger than the sum of its proper divisors (72843).

145557 is an frugal number, since it uses more digits than its factorization.

145557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 602 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 145557 is about 381.5193310961. The cubic root of 145557 is about 52.6030628508.

Subtracting from 145557 its sum of digits (27), we obtain a triangular number (145530 = T₅₃₉).

The spelling of 145557 in words is "one hundred forty-five thousand, five hundred fifty-seven".