1312685946 has 256 divisors, whose sum is σ = 3773952000. Its totient is φ = 331879680.

The previous prime is 1312685903. The next prime is 1312685981. The reversal of 1312685946 is 6495862131.

1312685946 is a `hidden beast` number, since 1 + 31 + 26 + 8 + 594 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3374320 + ... + 3374708.

It is an arithmetic number, because the mean of its divisors is an integer number (14742000).

Almost surely, 2^1312685946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312685946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1886976000).

1312685946 is an abundant number, since it is smaller than the sum of its proper divisors (2461266054).

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

1312685946 is a wasteful number, since it uses less digits than its factorization.

1312685946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 460 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1312685946 is about 36231.0080731961. The cubic root of 1312685946 is about 1094.9314875505.

The spelling of 1312685946 in words is "one billion, three hundred twelve million, six hundred eighty-five thousand, nine hundred forty-six".