1298156979 has 16 divisors (see below), whose sum is σ = 1979138048. Its totient is φ = 741431232.

The previous prime is 1298156963. The next prime is 1298157017. The reversal of 1298156979 is 9796518921.

It is not a de Polignac number, because 1298156979 - 2⁴ = 1298156963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298156929) 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, 30414 + ... + 59340.

It is an arithmetic number, because the mean of its divisors is an integer number (123696128).

Almost surely, 2^1298156979 is an apocalyptic number.

1298156979 is a deficient number, since it is larger than the sum of its proper divisors (680981069).

1298156979 is a wasteful number, since it uses less digits than its factorization.

1298156979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31074.

The product of its digits is 2449440, while the sum is 57.

The square root of 1298156979 is about 36029.9455869697. The cubic root of 1298156979 is about 1090.8768801619.

The spelling of 1298156979 in words is "one billion, two hundred ninety-eight million, one hundred fifty-six thousand, nine hundred seventy-nine".