1256715283 has 2 divisors, whose sum is σ = 1256715284. Its totient is φ = 1256715282.

The previous prime is 1256715269. The next prime is 1256715287. The reversal of 1256715283 is 3825176521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256715283 - 2¹³ = 1256707091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256715287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628357641 + 628357642.

It is an arithmetic number, because the mean of its divisors is an integer number (628357642).

Almost surely, 2^1256715283 is an apocalyptic number.

1256715283 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256715283 is an equidigital number, since it uses as much as digits as its factorization.

1256715283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 1256715283 is about 35450.1802957333. The cubic root of 1256715283 is about 1079.1429194008.

The spelling of 1256715283 in words is "one billion, two hundred fifty-six million, seven hundred fifteen thousand, two hundred eighty-three".