1231132620 has 48 divisors (see below), whose sum is σ = 3450359808. Its totient is φ = 327998400.

The previous prime is 1231132619. The next prime is 1231132631. The reversal of 1231132620 is 262311321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60147 + ... + 77973.

It is an arithmetic number, because the mean of its divisors is an integer number (71882496).

Almost surely, 2^1231132620 is an apocalyptic number.

1231132620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231132620 is an abundant number, since it is smaller than the sum of its proper divisors (2219227188).

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

1231132620 is a wasteful number, since it uses less digits than its factorization.

1231132620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18990 (or 18988 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1231132620 is about 35087.4994834343. The cubic root of 1231132620 is about 1071.7700402910.

Adding to 1231132620 its reverse (262311321), we get a palindrome (1493443941).

The spelling of 1231132620 in words is "one billion, two hundred thirty-one million, one hundred thirty-two thousand, six hundred twenty".