257485873 has 4 divisors (see below), whose sum is σ = 258620400. Its totient is φ = 256351348.

The previous prime is 257485841. The next prime is 257485903. The reversal of 257485873 is 378584752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257485873 - 2⁵ = 257485841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257488873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566923 + ... + 567376.

It is an arithmetic number, because the mean of its divisors is an integer number (64655100).

Almost surely, 2^257485873 is an apocalyptic number.

It is an amenable number.

257485873 is a deficient number, since it is larger than the sum of its proper divisors (1134527).

257485873 is a wasteful number, since it uses less digits than its factorization.

257485873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134526.

The product of its digits is 1881600, while the sum is 49.

The square root of 257485873 is about 16046.3663488031. The cubic root of 257485873 is about 636.1865289219.

The spelling of 257485873 in words is "two hundred fifty-seven million, four hundred eighty-five thousand, eight hundred seventy-three".