1231232776 has 16 divisors (see below), whose sum is σ = 2310693840. Its totient is φ = 615047760.

The previous prime is 1231232767. The next prime is 1231232777. The reversal of 1231232776 is 6772321321.

It is not an unprimeable number, because it can be changed into a prime (1231232777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61806 + ... + 79261.

It is an arithmetic number, because the mean of its divisors is an integer number (144418365).

Almost surely, 2^1231232776 is an apocalyptic number.

It is an amenable number.

1231232776 is a deficient number, since it is larger than the sum of its proper divisors (1079461064).

1231232776 is a wasteful number, since it uses less digits than its factorization.

1231232776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142164 (or 142160 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 1231232776 is about 35088.9266863494. The cubic root of 1231232776 is about 1071.7991033093.

The spelling of 1231232776 in words is "one billion, two hundred thirty-one million, two hundred thirty-two thousand, seven hundred seventy-six".