1215079161 has 16 divisors (see below), whose sum is σ = 1651580928. Its totient is φ = 794435600.

The previous prime is 1215079147. The next prime is 1215079163. The reversal of 1215079161 is 1619705121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215079161 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1215079163) 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, 25750 + ... + 55616.

It is an arithmetic number, because the mean of its divisors is an integer number (103223808).

Almost surely, 2^1215079161 is an apocalyptic number.

It is an amenable number.

1215079161 is a deficient number, since it is larger than the sum of its proper divisors (436501767).

1215079161 is a wasteful number, since it uses less digits than its factorization.

1215079161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30132.

The product of its (nonzero) digits is 3780, while the sum is 33.

The square root of 1215079161 is about 34857.9856130557. The cubic root of 1215079161 is about 1067.0911651014.

The spelling of 1215079161 in words is "one billion, two hundred fifteen million, seventy-nine thousand, one hundred sixty-one".