1299379515 has 16 divisors (see below), whose sum is σ = 2376008448. Its totient is φ = 594002016.

The previous prime is 1299379511. The next prime is 1299379519. The reversal of 1299379515 is 5159739921.

It is an interprime number because it is at equal distance from previous prime (1299379511) and next prime (1299379519).

It is not a de Polignac number, because 1299379515 - 2² = 1299379511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299379511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6187417 + ... + 6187626.

It is an arithmetic number, because the mean of its divisors is an integer number (148500528).

Almost surely, 2^1299379515 is an apocalyptic number.

1299379515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1299379515 is a deficient number, since it is larger than the sum of its proper divisors (1076628933).

1299379515 is a wasteful number, since it uses less digits than its factorization.

1299379515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12375058.

The product of its digits is 765450, while the sum is 51.

The square root of 1299379515 is about 36046.9071488803. The cubic root of 1299379515 is about 1091.2192162195.

The spelling of 1299379515 in words is "one billion, two hundred ninety-nine million, three hundred seventy-nine thousand, five hundred fifteen".