1215125208 has 96 divisors (see below), whose sum is σ = 3627383760. Its totient is φ = 364400640.

The previous prime is 1215125179. The next prime is 1215125227. The reversal of 1215125208 is 8025215121.

It is a happy number.

1215125208 is a `hidden beast` number, since 121 + 5 + 12 + 520 + 8 = 666.

It is a super-2 number, since 2×1215125208² = 2953058542234086528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68916 + ... + 84732.

Almost surely, 2^1215125208 is an apocalyptic number.

1215125208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215125208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813691880).

1215125208 is an abundant number, since it is smaller than the sum of its proper divisors (2412258552).

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

1215125208 is a wasteful number, since it uses less digits than its factorization.

1215125208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15937 (or 15930 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 1215125208 is about 34858.6461010751. The cubic root of 1215125208 is about 1067.1046445322.

The spelling of 1215125208 in words is "one billion, two hundred fifteen million, one hundred twenty-five thousand, two hundred eight".