1215253452 has 48 divisors (see below), whose sum is σ = 3411242240. Its totient is φ = 328940352.

The previous prime is 1215253447. The next prime is 1215253511. The reversal of 1215253452 is 2543525121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379123 + ... + 382314.

Almost surely, 2^1215253452 is an apocalyptic number.

1215253452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215253452 is an abundant number, since it is smaller than the sum of its proper divisors (2195988788).

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

1215253452 is a wasteful number, since it uses less digits than its factorization.

1215253452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761470 (or 761468 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 1215253452 is about 34860.4855387873. The cubic root of 1215253452 is about 1067.1421838609.

Adding to 1215253452 its reverse (2543525121), we get a palindrome (3758778573).

The spelling of 1215253452 in words is "one billion, two hundred fifteen million, two hundred fifty-three thousand, four hundred fifty-two".