1285916131 has 8 divisors (see below), whose sum is σ = 1349326080. Its totient is φ = 1223131272.

The previous prime is 1285916123. The next prime is 1285916147. The reversal of 1285916131 is 1316195821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1285916131 - 2³ = 1285916123 is a prime.

It is a super-2 number, since 2×1285916131² = 3307160591932018322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285916111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152055 + ... + 160288.

It is an arithmetic number, because the mean of its divisors is an integer number (168665760).

Almost surely, 2^1285916131 is an apocalyptic number.

1285916131 is a deficient number, since it is larger than the sum of its proper divisors (63409949).

1285916131 is a wasteful number, since it uses less digits than its factorization.

1285916131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312545.

The product of its digits is 12960, while the sum is 37.

The square root of 1285916131 is about 35859.6727676090. The cubic root of 1285916131 is about 1087.4372729222.

The spelling of 1285916131 in words is "one billion, two hundred eighty-five million, nine hundred sixteen thousand, one hundred thirty-one".