1255266731 has 2 divisors, whose sum is σ = 1255266732. Its totient is φ = 1255266730.

The previous prime is 1255266679. The next prime is 1255266739. The reversal of 1255266731 is 1376625521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255266731 - 2⁶ = 1255266667 is a prime.

It is a super-2 number, since 2×1255266731² = 3151389131910852722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1255266739) 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, 627633365 + 627633366.

It is an arithmetic number, because the mean of its divisors is an integer number (627633366).

Almost surely, 2^1255266731 is an apocalyptic number.

1255266731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255266731 is an equidigital number, since it uses as much as digits as its factorization.

1255266731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 1255266731 is about 35429.7435920725. The cubic root of 1255266731 is about 1078.7281355471.

The spelling of 1255266731 in words is "one billion, two hundred fifty-five million, two hundred sixty-six thousand, seven hundred thirty-one".