1256132711 has 2 divisors, whose sum is σ = 1256132712. Its totient is φ = 1256132710.

The previous prime is 1256132687. The next prime is 1256132719. The reversal of 1256132711 is 1172316521.

It is a strong prime.

It is an emirp because it is prime and its reverse (1172316521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256132711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256132719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628066355 + 628066356.

It is an arithmetic number, because the mean of its divisors is an integer number (628066356).

Almost surely, 2^1256132711 is an apocalyptic number.

1256132711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256132711 is an equidigital number, since it uses as much as digits as its factorization.

1256132711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 1256132711 is about 35441.9625726342. The cubic root of 1256132711 is about 1078.9761418691.

The spelling of 1256132711 in words is "one billion, two hundred fifty-six million, one hundred thirty-two thousand, seven hundred eleven".