257276485 has 4 divisors (see below), whose sum is σ = 308731788. Its totient is φ = 205821184.

The previous prime is 257276443. The next prime is 257276491. The reversal of 257276485 is 584672752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 179801281 + 77475204 = 13409^2 + 8802^2 .

It is a cyclic number.

It is not a de Polignac number, because 257276485 - 2⁹ = 257275973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25727644 + ... + 25727653.

It is an arithmetic number, because the mean of its divisors is an integer number (77182947).

Almost surely, 2^257276485 is an apocalyptic number.

It is an amenable number.

257276485 is a deficient number, since it is larger than the sum of its proper divisors (51455303).

257276485 is an equidigital number, since it uses as much as digits as its factorization.

257276485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51455302.

The product of its digits is 940800, while the sum is 46.

The square root of 257276485 is about 16039.8405540704. The cubic root of 257276485 is about 636.0140327917.

The spelling of 257276485 in words is "two hundred fifty-seven million, two hundred seventy-six thousand, four hundred eighty-five".