1215113604 has 12 divisors (see below), whose sum is σ = 2835265104. Its totient is φ = 405037864.

The previous prime is 1215113587. The next prime is 1215113623. The reversal of 1215113604 is 4063115121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50629722 + ... + 50629745.

It is an arithmetic number, because the mean of its divisors is an integer number (236272092).

Almost surely, 2^1215113604 is an apocalyptic number.

It is an amenable number.

1215113604 is an abundant number, since it is smaller than the sum of its proper divisors (1620151500).

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

1215113604 is a wasteful number, since it uses less digits than its factorization.

1215113604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101259474 (or 101259472 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1215113604 is about 34858.4796570361. The cubic root of 1215113604 is about 1067.1012477021.

Adding to 1215113604 its reverse (4063115121), we get a palindrome (5278228725).

The spelling of 1215113604 in words is "one billion, two hundred fifteen million, one hundred thirteen thousand, six hundred four".