1215495825 has 12 divisors (see below), whose sum is σ = 2009619888. Its totient is φ = 648264400.

The previous prime is 1215495823. The next prime is 1215495839. The reversal of 1215495825 is 5285945121.

1215495825 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1215495825 - 2¹ = 1215495823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215495823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8103231 + ... + 8103380.

It is an arithmetic number, because the mean of its divisors is an integer number (167468324).

Almost surely, 2^1215495825 is an apocalyptic number.

1215495825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215495825 is a deficient number, since it is larger than the sum of its proper divisors (794124063).

1215495825 is a wasteful number, since it uses less digits than its factorization.

1215495825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16206624 (or 16206619 counting only the distinct ones).

The product of its digits is 144000, while the sum is 42.

The square root of 1215495825 is about 34863.9616939900. The cubic root of 1215495825 is about 1067.2131235921.

The spelling of 1215495825 in words is "one billion, two hundred fifteen million, four hundred ninety-five thousand, eight hundred twenty-five".