256892485 has 4 divisors (see below), whose sum is σ = 308270988. Its totient is φ = 205513984.

The previous prime is 256892479. The next prime is 256892501. The reversal of 256892485 is 584298652.

It is a happy number.

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 116683204 + 140209281 = 10802^2 + 11841^2 .

It is a cyclic number.

It is not a de Polignac number, because 256892485 - 2⁵ = 256892453 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 25689244 + ... + 25689253.

It is an arithmetic number, because the mean of its divisors is an integer number (77067747).

Almost surely, 2^256892485 is an apocalyptic number.

It is an amenable number.

256892485 is a deficient number, since it is larger than the sum of its proper divisors (51378503).

256892485 is an equidigital number, since it uses as much as digits as its factorization.

256892485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51378502.

The product of its digits is 1382400, while the sum is 49.

The square root of 256892485 is about 16027.8658903798. The cubic root of 256892485 is about 635.6974460163.

The spelling of 256892485 in words is "two hundred fifty-six million, eight hundred ninety-two thousand, four hundred eighty-five".