257461147 has 2 divisors, whose sum is σ = 257461148. Its totient is φ = 257461146.

The previous prime is 257461129. The next prime is 257461163. The reversal of 257461147 is 741164752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257461147 is a prime.

It is not a weakly prime, because it can be changed into another prime (257461117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128730573 + 128730574.

It is an arithmetic number, because the mean of its divisors is an integer number (128730574).

Almost surely, 2^257461147 is an apocalyptic number.

257461147 is a deficient number, since it is larger than the sum of its proper divisors (1).

257461147 is an equidigital number, since it uses as much as digits as its factorization.

257461147 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 257461147 is about 16045.5958755043. The cubic root of 257461147 is about 636.1661642426.

The spelling of 257461147 in words is "two hundred fifty-seven million, four hundred sixty-one thousand, one hundred forty-seven".