1231240530 has 64 divisors (see below), whose sum is σ = 3292047360. Its totient is φ = 292621056.

The previous prime is 1231240523. The next prime is 1231240541. The reversal of 1231240530 is 350421321.

It is a junction number, because it is equal to n+sod(n) for n = 1231240497 and 1231240506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43122 + ... + 65741.

It is an arithmetic number, because the mean of its divisors is an integer number (51438240).

Almost surely, 2^1231240530 is an apocalyptic number.

1231240530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231240530 is an abundant number, since it is smaller than the sum of its proper divisors (2060806830).

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

1231240530 is a wasteful number, since it uses less digits than its factorization.

1231240530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108915.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1231240530 is about 35089.0371768733. The cubic root of 1231240530 is about 1071.8013532799.

Adding to 1231240530 its reverse (350421321), we get a palindrome (1581661851).

The spelling of 1231240530 in words is "one billion, two hundred thirty-one million, two hundred forty thousand, five hundred thirty".