1312292409 has 16 divisors (see below), whose sum is σ = 1770767232. Its totient is φ = 864379008.

The previous prime is 1312292383. The next prime is 1312292411. The reversal of 1312292409 is 9042922131.

It is not a de Polignac number, because 1312292409 - 2⁸ = 1312292153 is a prime.

It is a super-2 number, since 2×1312292409² = 3444222733438046562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1312292409.

It is not an unprimeable number, because it can be changed into a prime (1312292419) 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, 136567 + ... + 145859.

It is an arithmetic number, because the mean of its divisors is an integer number (110672952).

Almost surely, 2^1312292409 is an apocalyptic number.

It is an amenable number.

1312292409 is a deficient number, since it is larger than the sum of its proper divisors (458474823).

1312292409 is a wasteful number, since it uses less digits than its factorization.

1312292409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1312292409 is about 36225.5767241876. The cubic root of 1312292409 is about 1094.8220581978.

The spelling of 1312292409 in words is "one billion, three hundred twelve million, two hundred ninety-two thousand, four hundred nine".