401255239 has 16 divisors (see below), whose sum is σ = 504412416. Its totient is φ = 312659160.

The previous prime is 401255237. The next prime is 401255249. The reversal of 401255239 is 932552104.

It is not a de Polignac number, because 401255239 - 2¹ = 401255237 is a prime.

It is a super-2 number, since 2×401255239² = 322011533649894242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401255239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401255237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12217 + ... + 30850.

It is an arithmetic number, because the mean of its divisors is an integer number (31525776).

Almost surely, 2^401255239 is an apocalyptic number.

401255239 is a deficient number, since it is larger than the sum of its proper divisors (103157177).

401255239 is an equidigital number, since it uses as much as digits as its factorization.

401255239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43107 (or 43085 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 401255239 is about 20031.3563944132. The cubic root of 401255239 is about 737.5762182647.

The spelling of 401255239 in words is "four hundred one million, two hundred fifty-five thousand, two hundred thirty-nine".