1316861172 has 48 divisors (see below), whose sum is σ = 3724459200. Its totient is φ = 399048480.

The previous prime is 1316861171. The next prime is 1316861173. The reversal of 1316861172 is 2711686131.

1316861172 is a `hidden beast` number, since 1 + 31 + 6 + 8 + 611 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1316861171) and next prime (1316861173).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316861171) 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, 553047 + ... + 555422.

It is an arithmetic number, because the mean of its divisors is an integer number (77592900).

Almost surely, 2^1316861172 is an apocalyptic number.

1316861172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1316861172 is an abundant number, since it is smaller than the sum of its proper divisors (2407598028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1316861172 is a wasteful number, since it uses less digits than its factorization.

1316861172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108493 (or 1108485 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1316861172 is about 36288.5818405735. The cubic root of 1316861172 is about 1096.0911322893.

The spelling of 1316861172 in words is "one billion, three hundred sixteen million, eight hundred sixty-one thousand, one hundred seventy-two".