257561046 has 24 divisors (see below), whose sum is σ = 578718504. Its totient is φ = 85853520.

The previous prime is 257561021. The next prime is 257561047. The reversal of 257561046 is 640165752.

It is a happy number.

257561046 is a `hidden beast` number, since 2 + 57 + 561 + 0 + 46 = 666.

257561046 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×257561046² = 132675384833228232, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 257561046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257561047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264495 + ... + 265466.

It is an arithmetic number, because the mean of its divisors is an integer number (24113271).

Almost surely, 2^257561046 is an apocalyptic number.

257561046 is an abundant number, since it is smaller than the sum of its proper divisors (321157458).

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

257561046 is an equidigital number, since it uses as much as digits as its factorization.

257561046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529978 (or 529966 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 257561046 is about 16048.7085461728. The cubic root of 257561046 is about 636.2484344497.

The spelling of 257561046 in words is "two hundred fifty-seven million, five hundred sixty-one thousand, forty-six".