1252904844861 has 16 divisors (see below), whose sum is σ = 1860693619200. Its totient is φ = 833227664544.

The previous prime is 1252904844859. The next prime is 1252904844871. The reversal of 1252904844861 is 1684484092521.

1252904844861 is a `hidden beast` number, since 1 + 2 + 52 + 90 + 4 + 8 + 448 + 61 = 666.

It is not a de Polignac number, because 1252904844861 - 2¹ = 1252904844859 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1252904844798 and 1252904844807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252904844871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56717421 + ... + 56739506.

It is an arithmetic number, because the mean of its divisors is an integer number (116293351200).

Almost surely, 2^{1252904844861} is an apocalyptic number.

It is an amenable number.

1252904844861 is a deficient number, since it is larger than the sum of its proper divisors (607788774339).

1252904844861 is a wasteful number, since it uses less digits than its factorization.

1252904844861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113457345 (or 113457339 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 1252904844861 in words is "one trillion, two hundred fifty-two billion, nine hundred four million, eight hundred forty-four thousand, eight hundred sixty-one".