1292870879 has 4 divisors (see below), whose sum is σ = 1311080400. Its totient is φ = 1274661360.

The previous prime is 1292870863. The next prime is 1292870881. The reversal of 1292870879 is 9780782921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1292870879 - 2⁴ = 1292870863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1292870879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1292870819) 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, 9104654 + ... + 9104795.

It is an arithmetic number, because the mean of its divisors is an integer number (327770100).

Almost surely, 2^1292870879 is an apocalyptic number.

1292870879 is a deficient number, since it is larger than the sum of its proper divisors (18209521).

1292870879 is an equidigital number, since it uses as much as digits as its factorization.

1292870879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18209520.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 1292870879 is about 35956.5137214386. The cubic root of 1292870879 is about 1089.3941809269.

The spelling of 1292870879 in words is "one billion, two hundred ninety-two million, eight hundred seventy thousand, eight hundred seventy-nine".