401525520 has 80 divisors (see below), whose sum is σ = 1357895232. Its totient is φ = 97338880.

The previous prime is 401525507. The next prime is 401525539. The reversal of 401525520 is 25525104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×401525520² = 322445486422540800, which contains 22 as substring.

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

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, 73407 + ... + 78686.

Almost surely, 2^401525520 is an apocalyptic number.

401525520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401525520 is an abundant number, since it is smaller than the sum of its proper divisors (956369712).

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

401525520 is a wasteful number, since it uses less digits than its factorization.

401525520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152120 (or 152114 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 401525520 is about 20038.1017064990. The cubic root of 401525520 is about 737.7417887667.

The spelling of 401525520 in words is "four hundred one million, five hundred twenty-five thousand, five hundred twenty".