1231320076 has 12 divisors (see below), whose sum is σ = 2462640208. Its totient is φ = 527708592.

The previous prime is 1231320067. The next prime is 1231320091. The reversal of 1231320076 is 6700231321.

1231320076 is an admirable number.

It is a super-2 number, since 2×1231320076² = 3032298259121291552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1231320076.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21987831 + ... + 21987886.

Almost surely, 2^1231320076 is an apocalyptic number.

It is an amenable number.

1231320076 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1231320076 is a wasteful number, since it uses less digits than its factorization.

1231320076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43975728 (or 43975726 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1231320076 is about 35090.1706464930. The cubic root of 1231320076 is about 1071.8244345199.

Adding to 1231320076 its reverse (6700231321), we get a palindrome (7931551397).

The spelling of 1231320076 in words is "one billion, two hundred thirty-one million, three hundred twenty thousand, seventy-six".