1215675879 has 32 divisors (see below), whose sum is σ = 1942272000. Its totient is φ = 667640160.

The previous prime is 1215675847. The next prime is 1215675887. The reversal of 1215675879 is 9785765121.

It is not a de Polignac number, because 1215675879 - 2⁵ = 1215675847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215675889) 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 31 ways as a sum of consecutive naturals, for example, 27729 + ... + 56570.

It is an arithmetic number, because the mean of its divisors is an integer number (60696000).

Almost surely, 2^1215675879 is an apocalyptic number.

1215675879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1215675879 is a deficient number, since it is larger than the sum of its proper divisors (726596121).

1215675879 is a wasteful number, since it uses less digits than its factorization.

1215675879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84355.

The product of its digits is 1058400, while the sum is 51.

The square root of 1215675879 is about 34866.5438350290. The cubic root of 1215675879 is about 1067.2658171789.

The spelling of 1215675879 in words is "one billion, two hundred fifteen million, six hundred seventy-five thousand, eight hundred seventy-nine".