1231032402 has 24 divisors (see below), whose sum is σ = 2739325836. Its totient is φ = 399253536.

The previous prime is 1231032371. The next prime is 1231032403. The reversal of 1231032402 is 2042301321.

1231032402 is a `hidden beast` number, since 1 + 231 + 0 + 32 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1077743241 + 153289161 = 32829^2 + 12381^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1231032403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 923533 + ... + 924864.

Almost surely, 2^1231032402 is an apocalyptic number.

1231032402 is an abundant number, since it is smaller than the sum of its proper divisors (1508293434).

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

1231032402 is a wasteful number, since it uses less digits than its factorization.

1231032402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848442 (or 1848439 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1231032402 is about 35086.0713389231. The cubic root of 1231032402 is about 1071.7409577040.

Adding to 1231032402 its reverse (2042301321), we get a palindrome (3273333723).

The spelling of 1231032402 in words is "one billion, two hundred thirty-one million, thirty-two thousand, four hundred two".