1253021040520 has 32 divisors (see below), whose sum is σ = 2823319226520. Its totient is φ = 500493414400.

The previous prime is 1253021040503. The next prime is 1253021040521. The reversal of 1253021040520 is 250401203521.

It can be written as a sum of positive squares in 4 ways, for example, as 1249606508164 + 3414532356 = 1117858^2 + 58434^2 .

It is not an unprimeable number, because it can be changed into a prime (1253021040521) 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, 22315417 + ... + 22371496.

Almost surely, 2^{1253021040520} is an apocalyptic number.

1253021040520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253021040520 is an abundant number, since it is smaller than the sum of its proper divisors (1570298186000).

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

1253021040520 is a wasteful number, since it uses less digits than its factorization.

1253021040520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44687625 (or 44687621 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 1253021040520 in words is "one trillion, two hundred fifty-three billion, twenty-one million, forty thousand, five hundred twenty".