1252344321520 has 40 divisors (see below), whose sum is σ = 3005626377600. Its totient is φ = 484778446080.

The previous prime is 1252344321509. The next prime is 1252344321539. The reversal of 1252344321520 is 251234432521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1252344321520² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252486295 + ... + 252491254.

It is an arithmetic number, because the mean of its divisors is an integer number (75140659440).

Almost surely, 2^{1252344321520} is an apocalyptic number.

1252344321520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252344321520 is an abundant number, since it is smaller than the sum of its proper divisors (1753282056080).

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

1252344321520 is a wasteful number, since it uses less digits than its factorization.

1252344321520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504977593 (or 504977587 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 1252344321520 in words is "one trillion, two hundred fifty-two billion, three hundred forty-four million, three hundred twenty-one thousand, five hundred twenty".