1231256632 has 8 divisors (see below), whose sum is σ = 2308606200. Its totient is φ = 615628312.

The previous prime is 1231256629. The next prime is 1231256669. The reversal of 1231256632 is 2366521321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1231256594 and 1231256603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76953532 + ... + 76953547.

It is an arithmetic number, because the mean of its divisors is an integer number (288575775).

Almost surely, 2^1231256632 is an apocalyptic number.

It is an amenable number.

1231256632 is a deficient number, since it is larger than the sum of its proper divisors (1077349568).

1231256632 is a wasteful number, since it uses less digits than its factorization.

1231256632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153907085 (or 153907081 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1231256632 is about 35089.2666210053. The cubic root of 1231256632 is about 1071.8060255514.

Adding to 1231256632 its reverse (2366521321), we get a palindrome (3597777953).

The spelling of 1231256632 in words is "one billion, two hundred thirty-one million, two hundred fifty-six thousand, six hundred thirty-two".