257238127 has 2 divisors, whose sum is σ = 257238128. Its totient is φ = 257238126.

The previous prime is 257238043. The next prime is 257238133. The reversal of 257238127 is 721832752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257238127 - 2¹⁹ = 256713839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257235127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128619063 + 128619064.

It is an arithmetic number, because the mean of its divisors is an integer number (128619064).

Almost surely, 2^257238127 is an apocalyptic number.

257238127 is a deficient number, since it is larger than the sum of its proper divisors (1).

257238127 is an equidigital number, since it uses as much as digits as its factorization.

257238127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 257238127 is about 16038.6447993588. The cubic root of 257238127 is about 635.9824229086.

The spelling of 257238127 in words is "two hundred fifty-seven million, two hundred thirty-eight thousand, one hundred twenty-seven".