257562047 has 2 divisors, whose sum is σ = 257562048. Its totient is φ = 257562046.

The previous prime is 257562013. The next prime is 257562049. The reversal of 257562047 is 740265752.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257562047 is a prime.

Together with 257562049, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257562047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257562049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128781023 + 128781024.

It is an arithmetic number, because the mean of its divisors is an integer number (128781024).

Almost surely, 2^257562047 is an apocalyptic number.

257562047 is a deficient number, since it is larger than the sum of its proper divisors (1).

257562047 is an equidigital number, since it uses as much as digits as its factorization.

257562047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 257562047 is about 16048.7397324525. The cubic root of 257562047 is about 636.2492586994.

The spelling of 257562047 in words is "two hundred fifty-seven million, five hundred sixty-two thousand, forty-seven".