1299977456 has 10 divisors (see below), whose sum is σ = 2518706352. Its totient is φ = 649988720.

The previous prime is 1299977449. The next prime is 1299977479. The reversal of 1299977456 is 6547799921.

It is a super-2 number, since 2×1299977456² = 3379882772216463872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1299977395 and 1299977404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40624280 + ... + 40624311.

Almost surely, 2^1299977456 is an apocalyptic number.

1299977456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1299977456 is a deficient number, since it is larger than the sum of its proper divisors (1218728896).

1299977456 is an equidigital number, since it uses as much as digits as its factorization.

1299977456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81248599 (or 81248593 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 59.

The square root of 1299977456 is about 36055.2001242539. The cubic root of 1299977456 is about 1091.3865742141.

The spelling of 1299977456 in words is "one billion, two hundred ninety-nine million, nine hundred seventy-seven thousand, four hundred fifty-six".