1016256257 has 2 divisors, whose sum is σ = 1016256258. Its totient is φ = 1016256256.

The previous prime is 1016256253. The next prime is 1016256259. The reversal of 1016256257 is 7526526101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015760641 + 495616 = 31871^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 1016256257 - 2² = 1016256253 is a prime.

Together with 1016256259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1016256253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508128128 + 508128129.

It is an arithmetic number, because the mean of its divisors is an integer number (508128129).

Almost surely, 2^1016256257 is an apocalyptic number.

It is an amenable number.

1016256257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016256257 is an equidigital number, since it uses as much as digits as its factorization.

1016256257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1016256257 is about 31878.7743961401. The cubic root of 1016256257 is about 1005.3896518000.

The spelling of 1016256257 in words is "one billion, sixteen million, two hundred fifty-six thousand, two hundred fifty-seven".