1264026139231 has 2 divisors, whose sum is σ = 1264026139232. Its totient is φ = 1264026139230.

The previous prime is 1264026139213. The next prime is 1264026139237. The reversal of 1264026139231 is 1329316204621.

Together with previous prime (1264026139213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1264026139231 - 2²⁹ = 1263489268319 is a prime.

It is a super-2 number, since 2×1264026139231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264026139237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632013069615 + 632013069616.

It is an arithmetic number, because the mean of its divisors is an integer number (632013069616).

Almost surely, 2^{1264026139231} is an apocalyptic number.

1264026139231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264026139231 is an equidigital number, since it uses as much as digits as its factorization.

1264026139231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 1264026139231 in words is "one trillion, two hundred sixty-four billion, twenty-six million, one hundred thirty-nine thousand, two hundred thirty-one".