1231696745 has 8 divisors (see below), whose sum is σ = 1480507200. Its totient is φ = 983710000.

The previous prime is 1231696657. The next prime is 1231696771. The reversal of 1231696745 is 5476961321.

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

It is not a de Polignac number, because 1231696745 - 2¹⁸ = 1231434601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231696696 and 1231696705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202631 + ... + 208620.

It is an arithmetic number, because the mean of its divisors is an integer number (185063400).

Almost surely, 2^1231696745 is an apocalyptic number.

It is an amenable number.

1231696745 is a deficient number, since it is larger than the sum of its proper divisors (248810455).

1231696745 is an equidigital number, since it uses as much as digits as its factorization.

1231696745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411855.

The product of its digits is 272160, while the sum is 44.

The square root of 1231696745 is about 35095.5373943754. The cubic root of 1231696745 is about 1071.9337161182.

The spelling of 1231696745 in words is "one billion, two hundred thirty-one million, six hundred ninety-six thousand, seven hundred forty-five".