1252553400120 has 128 divisors (see below), whose sum is σ = 4194597623040. Its totient is φ = 296587683840.

The previous prime is 1252553400083. The next prime is 1252553400151. The reversal of 1252553400120 is 210043552521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10977009 + ... + 11090528.

It is an arithmetic number, because the mean of its divisors is an integer number (32770293930).

Almost surely, 2^{1252553400120} is an apocalyptic number.

1252553400120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252553400120 is an abundant number, since it is smaller than the sum of its proper divisors (2942044222920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252553400120 is a wasteful number, since it uses less digits than its factorization.

1252553400120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22067605 (or 22067601 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 1252553400120 its reverse (210043552521), we get a palindrome (1462596952641).

The spelling of 1252553400120 in words is "one trillion, two hundred fifty-two billion, five hundred fifty-three million, four hundred thousand, one hundred twenty".