1231320974 has 8 divisors (see below), whose sum is σ = 1989057000. Its totient is φ = 568301976.

The previous prime is 1231320971. The next prime is 1231320977. The reversal of 1231320974 is 4790231321.

It is an interprime number because it is at equal distance from previous prime (1231320971) and next prime (1231320977).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1231320974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231320971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23679224 + ... + 23679275.

It is an arithmetic number, because the mean of its divisors is an integer number (248632125).

Almost surely, 2^1231320974 is an apocalyptic number.

1231320974 is a deficient number, since it is larger than the sum of its proper divisors (757736026).

1231320974 is a wasteful number, since it uses less digits than its factorization.

1231320974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47358514.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1231320974 is about 35090.1834420967. The cubic root of 1231320974 is about 1071.8246950798.

The spelling of 1231320974 in words is "one billion, two hundred thirty-one million, three hundred twenty thousand, nine hundred seventy-four".