400051265 has 8 divisors (see below), whose sum is σ = 480352680. Its totient is φ = 319846912.

The previous prime is 400051199. The next prime is 400051271. The reversal of 400051265 is 562150004.

It can be written as a sum of positive squares in 4 ways, for example, as 31449664 + 368601601 = 5608^2 + 19199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400051265 - 2⁸ = 400051009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400051265.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14864 + ... + 31953.

It is an arithmetic number, because the mean of its divisors is an integer number (60044085).

Almost surely, 2^400051265 is an apocalyptic number.

It is an amenable number.

400051265 is a deficient number, since it is larger than the sum of its proper divisors (80301415).

400051265 is a wasteful number, since it uses less digits than its factorization.

400051265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48531.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 400051265 is about 20001.2815839386. The cubic root of 400051265 is about 736.8377753626.

The spelling of 400051265 in words is "four hundred million, fifty-one thousand, two hundred sixty-five".