1252601237999 has 2 divisors, whose sum is σ = 1252601238000. Its totient is φ = 1252601237998.

The previous prime is 1252601237977. The next prime is 1252601238013. The reversal of 1252601237999 is 9997321062521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1252601237999 - 2³⁶ = 1183881761263 is a prime.

It is a super-2 number, since 2×1252601237999² (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 (1252601237939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626300618999 + 626300619000.

It is an arithmetic number, because the mean of its divisors is an integer number (626300619000).

Almost surely, 2^{1252601237999} is an apocalyptic number.

1252601237999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252601237999 is an equidigital number, since it uses as much as digits as its factorization.

1252601237999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 1252601237999 in words is "one trillion, two hundred fifty-two billion, six hundred one million, two hundred thirty-seven thousand, nine hundred ninety-nine".