245812257 has 12 divisors (see below), whose sum is σ = 356747664. Its totient is φ = 163096920.

The previous prime is 245812169. The next prime is 245812267. The reversal of 245812257 is 752218542.

It is a happy number.

245812257 is a `hidden beast` number, since 2 + 4 + 581 + 22 + 57 = 666.

It is not a de Polignac number, because 245812257 - 2⁸ = 245812001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245812267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62823 + ... + 66620.

It is an arithmetic number, because the mean of its divisors is an integer number (29728972).

Almost surely, 2^245812257 is an apocalyptic number.

It is an amenable number.

245812257 is a deficient number, since it is larger than the sum of its proper divisors (110935407).

245812257 is a wasteful number, since it uses less digits than its factorization.

245812257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129660 (or 129657 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 245812257 is about 15678.4009707623. The cubic root of 245812257 is about 626.4232159767.

The spelling of 245812257 in words is "two hundred forty-five million, eight hundred twelve thousand, two hundred fifty-seven".