1215107712 has 384 divisors, whose sum is σ = 4392984960. Its totient is φ = 313860096.

The previous prime is 1215107711. The next prime is 1215107753. The reversal of 1215107712 is 2177015121.

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (1215107711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7023658 + ... + 7023830.

It is an arithmetic number, because the mean of its divisors is an integer number (11440065).

Almost surely, 2^1215107712 is an apocalyptic number.

1215107712 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 1215107712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2196492480).

1215107712 is an abundant number, since it is smaller than the sum of its proper divisors (3177877248).

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

1215107712 is a wasteful number, since it uses less digits than its factorization.

1215107712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 27.

The square root of 1215107712 is about 34858.3951437814. The cubic root of 1215107712 is about 1067.0995229331.

The spelling of 1215107712 in words is "one billion, two hundred fifteen million, one hundred seven thousand, seven hundred twelve".