1276113912 has 64 divisors (see below), whose sum is σ = 3319056000. Its totient is φ = 408369024.

The previous prime is 1276113911. The next prime is 1276113953. The reversal of 1276113912 is 2193116721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276113911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119463 + ... + 129705.

It is an arithmetic number, because the mean of its divisors is an integer number (51860250).

Almost surely, 2^1276113912 is an apocalyptic number.

1276113912 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 1276113912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1659528000).

1276113912 is an abundant number, since it is smaller than the sum of its proper divisors (2042942088).

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

1276113912 is a wasteful number, since it uses less digits than its factorization.

1276113912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460 (or 10456 counting only the distinct ones).

The product of its digits is 4536, while the sum is 33.

The square root of 1276113912 is about 35722.7366252923. The cubic root of 1276113912 is about 1084.6671342590.

The spelling of 1276113912 in words is "one billion, two hundred seventy-six million, one hundred thirteen thousand, nine hundred twelve".