1252311401620 has 96 divisors (see below), whose sum is σ = 2743741123200. Its totient is φ = 479533017600.

The previous prime is 1252311401609. The next prime is 1252311401647. The reversal of 1252311401620 is 261041132521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93372715 + ... + 93386125.

It is an arithmetic number, because the mean of its divisors is an integer number (28580636700).

Almost surely, 2^{1252311401620} is an apocalyptic number.

1252311401620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252311401620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1371870561600).

1252311401620 is an abundant number, since it is smaller than the sum of its proper divisors (1491429721580).

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

1252311401620 is a wasteful number, since it uses less digits than its factorization.

1252311401620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14809 (or 14807 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 1252311401620 in words is "one trillion, two hundred fifty-two billion, three hundred eleven million, four hundred one thousand, six hundred twenty".