1249159915 has 32 divisors (see below), whose sum is σ = 1656801216. Its totient is φ = 900157440.

The previous prime is 1249159909. The next prime is 1249159939. The reversal of 1249159915 is 5199519421.

It is not a de Polignac number, because 1249159915 - 2¹¹ = 1249157867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181324 + ... + 188086.

It is an arithmetic number, because the mean of its divisors is an integer number (51775038).

Almost surely, 2^1249159915 is an apocalyptic number.

1249159915 is a deficient number, since it is larger than the sum of its proper divisors (407641301).

1249159915 is a wasteful number, since it uses less digits than its factorization.

1249159915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879.

The product of its digits is 145800, while the sum is 46.

The square root of 1249159915 is about 35343.4564665088. The cubic root of 1249159915 is about 1076.9759698321.

The spelling of 1249159915 in words is "one billion, two hundred forty-nine million, one hundred fifty-nine thousand, nine hundred fifteen".