1252515013261 has 2 divisors, whose sum is σ = 1252515013262. Its totient is φ = 1252515013260.

The previous prime is 1252515013199. The next prime is 1252515013297. The reversal of 1252515013261 is 1623105152521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749273747236 + 503241266025 = 865606^2 + 709395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252515013261 - 2²⁵ = 1252481458829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252515013861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626257506630 + 626257506631.

It is an arithmetic number, because the mean of its divisors is an integer number (626257506631).

Almost surely, 2^{1252515013261} is an apocalyptic number.

It is an amenable number.

1252515013261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252515013261 is an equidigital number, since it uses as much as digits as its factorization.

1252515013261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 1252515013261 in words is "one trillion, two hundred fifty-two billion, five hundred fifteen million, thirteen thousand, two hundred sixty-one".