401565425 has 6 divisors (see below), whose sum is σ = 497941158. Its totient is φ = 321252320.

The previous prime is 401565401. The next prime is 401565431. The reversal of 401565425 is 524565104.

It can be written as a sum of positive squares in 3 ways, for example, as 6390784 + 395174641 = 2528^2 + 19879^2 .

It is not a de Polignac number, because 401565425 - 2⁸ = 401565169 is a prime.

It is a super-2 number, since 2×401565425² = 322509581110861250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 401565391 and 401565400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8031284 + ... + 8031333.

It is an arithmetic number, because the mean of its divisors is an integer number (82990193).

Almost surely, 2^401565425 is an apocalyptic number.

It is an amenable number.

401565425 is a deficient number, since it is larger than the sum of its proper divisors (96375733).

401565425 is a wasteful number, since it uses less digits than its factorization.

401565425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16062627 (or 16062622 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 401565425 is about 20039.0974098136. The cubic root of 401565425 is about 737.7662277370.

The spelling of 401565425 in words is "four hundred one million, five hundred sixty-five thousand, four hundred twenty-five".