257825146 has 16 divisors (see below), whose sum is σ = 389781000. Its totient is φ = 127902528.

The previous prime is 257825143. The next prime is 257825153. The reversal of 257825146 is 641528752.

It can be written as a sum of positive squares in 4 ways, for example, as 257121225 + 703921 = 16035^2 + 839^2 .

It is a junction number, because it is equal to n+sod(n) for n = 257825099 and 257825108.

It is not an unprimeable number, because it can be changed into a prime (257825143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159036 + ... + 160648.

Almost surely, 2^257825146 is an apocalyptic number.

257825146 is a deficient number, since it is larger than the sum of its proper divisors (131955854).

257825146 is a wasteful number, since it uses less digits than its factorization.

257825146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193.

The product of its digits is 134400, while the sum is 40.

The square root of 257825146 is about 16056.9345144084. The cubic root of 257825146 is about 636.4658273277.

The spelling of 257825146 in words is "two hundred fifty-seven million, eight hundred twenty-five thousand, one hundred forty-six".