1215127136 has 24 divisors (see below), whose sum is σ = 2393546904. Its totient is φ = 607242240.

The previous prime is 1215127129. The next prime is 1215127169. The reversal of 1215127136 is 6317215121.

It is a junction number, because it is equal to n+sod(n) for n = 1215127099 and 1215127108.

It is a congruent number.

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, 58631 + ... + 76601.

It is an arithmetic number, because the mean of its divisors is an integer number (99731121).

Almost surely, 2^1215127136 is an apocalyptic number.

1215127136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1215127136 is a deficient number, since it is larger than the sum of its proper divisors (1178419768).

1215127136 is a wasteful number, since it uses less digits than its factorization.

1215127136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094 (or 20086 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 1215127136 is about 34858.6737556092. The cubic root of 1215127136 is about 1067.1052089121.

The spelling of 1215127136 in words is "one billion, two hundred fifteen million, one hundred twenty-seven thousand, one hundred thirty-six".