401255560 has 32 divisors (see below), whose sum is σ = 917631000. Its totient is φ = 157870080.

The previous prime is 401255551. The next prime is 401255587. The reversal of 401255560 is 65552104.

It can be written as a sum of positive squares in 4 ways, for example, as 264973284 + 136282276 = 16278^2 + 11674^2 .

It is a super-2 number, since 2×401255560² = 322012048861827200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79785 + ... + 84664.

Almost surely, 2^401255560 is an apocalyptic number.

401255560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401255560 is an abundant number, since it is smaller than the sum of its proper divisors (516375440).

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

401255560 is a wasteful number, since it uses less digits than its factorization.

401255560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164521 (or 164517 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 401255560 is about 20031.3644068496. The cubic root of 401255560 is about 737.5764149491.

The spelling of 401255560 in words is "four hundred one million, two hundred fifty-five thousand, five hundred sixty".