1253113520 has 40 divisors (see below), whose sum is σ = 3084873984. Its totient is φ = 471759872.

The previous prime is 1253113513. The next prime is 1253113523. The reversal of 1253113520 is 253113521.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1253113523) 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, 459344 + ... + 462063.

Almost surely, 2^1253113520 is an apocalyptic number.

1253113520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253113520 is an abundant number, since it is smaller than the sum of its proper divisors (1831760464).

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

1253113520 is a wasteful number, since it uses less digits than its factorization.

1253113520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921437 (or 921431 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1253113520 is about 35399.3434967373. The cubic root of 1253113520 is about 1078.1109868598.

Subtracting from 1253113520 its reverse (253113521), we obtain a palindrome (999999999).

The spelling of 1253113520 in words is "one billion, two hundred fifty-three million, one hundred thirteen thousand, five hundred twenty".