400561253 has 16 divisors (see below), whose sum is σ = 421545600. Its totient is φ = 380116800.

The previous prime is 400561247. The next prime is 400561277. The reversal of 400561253 is 352165004.

It is a cyclic number.

It is not a de Polignac number, because 400561253 - 2²⁶ = 333452389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400561283) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 477008 + ... + 477846.

It is an arithmetic number, because the mean of its divisors is an integer number (26346600).

Almost surely, 2^400561253 is an apocalyptic number.

It is an amenable number.

400561253 is a deficient number, since it is larger than the sum of its proper divisors (20984347).

400561253 is a wasteful number, since it uses less digits than its factorization.

400561253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 400561253 is about 20014.0264064980. The cubic root of 400561253 is about 737.1507509632.

The spelling of 400561253 in words is "four hundred million, five hundred sixty-one thousand, two hundred fifty-three".