145001556 has 48 divisors (see below), whose sum is σ = 429636480. Its totient is φ = 41428800.

The previous prime is 145001447. The next prime is 145001561. The reversal of 145001556 is 655100541.

It is a happy number.

145001556 is a `hidden beast` number, since 1 + 4 + 500 + 155 + 6 = 666.

It is a super-2 number, since 2×145001556² = 42050902484842272, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95145 + ... + 96656.

It is an arithmetic number, because the mean of its divisors is an integer number (8950760).

Almost surely, 2^145001556 is an apocalyptic number.

It is an amenable number.

145001556 is an abundant number, since it is smaller than the sum of its proper divisors (284634924).

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

145001556 is a wasteful number, since it uses less digits than its factorization.

145001556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191821 (or 191813 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 145001556 is about 12041.6591880023. The cubic root of 145001556 is about 525.3606664570.

The spelling of 145001556 in words is "one hundred forty-five million, one thousand, five hundred fifty-six".