1231095980 has 24 divisors (see below), whose sum is σ = 2621717280. Its totient is φ = 485502080.

The previous prime is 1231095979. The next prime is 1231095997. The reversal of 1231095980 is 895901321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432065 + ... + 434904.

It is an arithmetic number, because the mean of its divisors is an integer number (109238220).

Almost surely, 2^1231095980 is an apocalyptic number.

1231095980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231095980 is an abundant number, since it is smaller than the sum of its proper divisors (1390621300).

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

1231095980 is a wasteful number, since it uses less digits than its factorization.

1231095980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867049 (or 867047 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1231095980 is about 35086.9773562785. The cubic root of 1231095980 is about 1071.7594077934.

The spelling of 1231095980 in words is "one billion, two hundred thirty-one million, ninety-five thousand, nine hundred eighty".