257269145 has 16 divisors (see below), whose sum is σ = 368167680. Its totient is φ = 168742464.

The previous prime is 257269141. The next prime is 257269151. The reversal of 257269145 is 541962752.

It is a cyclic number.

It is not a de Polignac number, because 257269145 - 2² = 257269141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257269141) 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 15 ways as a sum of consecutive naturals, for example, 158990 + ... + 160599.

It is an arithmetic number, because the mean of its divisors is an integer number (23010480).

Almost surely, 2^257269145 is an apocalyptic number.

It is an amenable number.

257269145 is a deficient number, since it is larger than the sum of its proper divisors (110898535).

257269145 is a wasteful number, since it uses less digits than its factorization.

257269145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319624.

The product of its digits is 151200, while the sum is 41.

The square root of 257269145 is about 16039.6117471714. The cubic root of 257269145 is about 636.0079843215.

It can be divided in two parts, 2572 and 69145, that added together give a palindrome (71717).

The spelling of 257269145 in words is "two hundred fifty-seven million, two hundred sixty-nine thousand, one hundred forty-five".