1252761911069 has 2 divisors, whose sum is σ = 1252761911070. Its totient is φ = 1252761911068.

The previous prime is 1252761910997. The next prime is 1252761911111. The reversal of 1252761911069 is 9601191672521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951346636900 + 301415274169 = 975370^2 + 549013^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252761911069 - 2²⁸ = 1252493475613 is a prime.

It is a super-2 number, since 2×1252761911069² (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 (1252761911969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626380955534 + 626380955535.

It is an arithmetic number, because the mean of its divisors is an integer number (626380955535).

Almost surely, 2^{1252761911069} is an apocalyptic number.

It is an amenable number.

1252761911069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252761911069 is an equidigital number, since it uses as much as digits as its factorization.

1252761911069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 50.

The spelling of 1252761911069 in words is "one trillion, two hundred fifty-two billion, seven hundred sixty-one million, nine hundred eleven thousand, sixty-nine".