145253040 has 40 divisors (see below), whose sum is σ = 450285168. Its totient is φ = 38734080.

The previous prime is 145253039. The next prime is 145253047. The reversal of 145253040 is 40352541.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 145253040.

It is not an unprimeable number, because it can be changed into a prime (145253047) 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, 302371 + ... + 302850.

Almost surely, 2^145253040 is an apocalyptic number.

145253040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145253040 is an abundant number, since it is smaller than the sum of its proper divisors (305032128).

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

145253040 is a wasteful number, since it uses less digits than its factorization.

145253040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605237 (or 605231 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 145253040 is about 12052.0969129857. The cubic root of 145253040 is about 525.6642114629.

The spelling of 145253040 in words is "one hundred forty-five million, two hundred fifty-three thousand, forty".