1231402404 has 12 divisors (see below), whose sum is σ = 2873272304. Its totient is φ = 410467464.

The previous prime is 1231402399. The next prime is 1231402411. The reversal of 1231402404 is 4042041321.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51308422 + ... + 51308445.

Almost surely, 2^1231402404 is an apocalyptic number.

It is an amenable number.

1231402404 is an abundant number, since it is smaller than the sum of its proper divisors (1641869900).

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

1231402404 is a wasteful number, since it uses less digits than its factorization.

1231402404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102616874 (or 102616872 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1231402404 is about 35091.3437189287. The cubic root of 1231402404 is about 1071.8483219442.

Adding to 1231402404 its reverse (4042041321), we get a palindrome (5273443725).

The spelling of 1231402404 in words is "one billion, two hundred thirty-one million, four hundred two thousand, four hundred four".