1276417812 has 12 divisors (see below), whose sum is σ = 2978308256. Its totient is φ = 425472600.

The previous prime is 1276417799. The next prime is 1276417819. The reversal of 1276417812 is 2187146721.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276417819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53184064 + ... + 53184087.

Almost surely, 2^1276417812 is an apocalyptic number.

1276417812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1276417812 is an abundant number, since it is smaller than the sum of its proper divisors (1701890444).

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

1276417812 is a wasteful number, since it uses less digits than its factorization.

1276417812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106368158 (or 106368156 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 1276417812 is about 35726.9899655708. The cubic root of 1276417812 is about 1084.7532300680.

The spelling of 1276417812 in words is "one billion, two hundred seventy-six million, four hundred seventeen thousand, eight hundred twelve".