1252531275220 has 24 divisors (see below), whose sum is σ = 2633488590600. Its totient is φ = 500408145792.

The previous prime is 1252531275217. The next prime is 1252531275221. The reversal of 1252531275220 is 225721352521.

It can be written as a sum of positive squares in 4 ways, for example, as 239203159056 + 1013328116164 = 489084^2 + 1006642^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1252531275220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252531275221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37755775 + ... + 37788934.

It is an arithmetic number, because the mean of its divisors is an integer number (109728691275).

Almost surely, 2^{1252531275220} is an apocalyptic number.

1252531275220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252531275220 is an abundant number, since it is smaller than the sum of its proper divisors (1380957315380).

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

1252531275220 is a wasteful number, since it uses less digits than its factorization.

1252531275220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75545547 (or 75545545 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 1252531275220 in words is "one trillion, two hundred fifty-two billion, five hundred thirty-one million, two hundred seventy-five thousand, two hundred twenty".