1215294912 has 168 divisors, whose sum is σ = 3972464496. Its totient is φ = 351903744.

The previous prime is 1215294811. The next prime is 1215294917. The reversal of 1215294912 is 2194925121.

1215294912 is a `hidden beast` number, since 12 + 152 + 9 + 491 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215294917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122523 + ... + 132069.

It is an arithmetic number, because the mean of its divisors is an integer number (23645622).

Almost surely, 2^1215294912 is an apocalyptic number.

1215294912 is a gapful number since it is divisible by the number (12) 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 1215294912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1986232248).

1215294912 is an abundant number, since it is smaller than the sum of its proper divisors (2757169584).

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

1215294912 is a wasteful number, since it uses less digits than its factorization.

1215294912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595 (or 9582 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1215294912 is about 34861.0801898048. The cubic root of 1215294912 is about 1067.1543193848.

The spelling of 1215294912 in words is "one billion, two hundred fifteen million, two hundred ninety-four thousand, nine hundred twelve".