1215146156 has 24 divisors (see below), whose sum is σ = 2495978016. Its totient is φ = 506701440.

The previous prime is 1215146147. The next prime is 1215146167. The reversal of 1215146156 is 6516415121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585425 + ... + 587496.

It is an arithmetic number, because the mean of its divisors is an integer number (103999084).

Almost surely, 2^1215146156 is an apocalyptic number.

It is an amenable number.

1215146156 is an abundant number, since it is smaller than the sum of its proper divisors (1280831860).

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

1215146156 is a wasteful number, since it uses less digits than its factorization.

1215146156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172969 (or 1172967 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The square root of 1215146156 is about 34858.9465704287. The cubic root of 1215146156 is about 1067.1107765696.

The spelling of 1215146156 in words is "one billion, two hundred fifteen million, one hundred forty-six thousand, one hundred fifty-six".