1277199012 has 12 divisors (see below), whose sum is σ = 2980131056. Its totient is φ = 425733000.

The previous prime is 1277198999. The next prime is 1277199043. The reversal of 1277199012 is 2109917721.

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

It is a super-2 number, since 2×1277199012² = 3262474632507552288, which contains 22 as substring.

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, 53216614 + ... + 53216637.

Almost surely, 2^1277199012 is an apocalyptic number.

1277199012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1277199012 is an abundant number, since it is smaller than the sum of its proper divisors (1702932044).

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

1277199012 is a wasteful number, since it uses less digits than its factorization.

1277199012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106433258 (or 106433256 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 39.

The square root of 1277199012 is about 35737.9212042335. The cubic root of 1277199012 is about 1084.9744837452.

The spelling of 1277199012 in words is "one billion, two hundred seventy-seven million, one hundred ninety-nine thousand, twelve".