1231967012 has 6 divisors (see below), whose sum is σ = 2155942278. Its totient is φ = 615983504.

The previous prime is 1231966969. The next prime is 1231967021. The reversal of 1231967012 is 2107691321.

It can be written as a sum of positive squares in only one way, i.e., 650964196 + 581002816 = 25514^2 + 24104^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1231967012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153995873 + ... + 153995880.

It is an arithmetic number, because the mean of its divisors is an integer number (359323713).

Almost surely, 2^1231967012 is an apocalyptic number.

It is an amenable number.

1231967012 is a deficient number, since it is larger than the sum of its proper divisors (923975266).

1231967012 is a wasteful number, since it uses less digits than its factorization.

1231967012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307991757 (or 307991755 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1231967012 is about 35099.3876299858. The cubic root of 1231967012 is about 1072.0121139661.

The spelling of 1231967012 in words is "one billion, two hundred thirty-one million, nine hundred sixty-seven thousand, twelve".