1296384879 has 16 divisors (see below), whose sum is σ = 1769564160. Its totient is φ = 843820320.

The previous prime is 1296384833. The next prime is 1296384889. The reversal of 1296384879 is 9784836921.

It is not a de Polignac number, because 1296384879 - 2⁹ = 1296384367 is a prime.

It is a super-2 number, since 2×1296384879² = 3361227508999689282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296384829) 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, 48442 + ... + 70280.

It is an arithmetic number, because the mean of its divisors is an integer number (110597760).

Almost surely, 2^1296384879 is an apocalyptic number.

1296384879 is a deficient number, since it is larger than the sum of its proper divisors (473179281).

1296384879 is a wasteful number, since it uses less digits than its factorization.

1296384879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22310.

The product of its digits is 5225472, while the sum is 57.

The square root of 1296384879 is about 36005.3451448531. The cubic root of 1296384879 is about 1090.3802727265.

The spelling of 1296384879 in words is "one billion, two hundred ninety-six million, three hundred eighty-four thousand, eight hundred seventy-nine".