1231235404 has 24 divisors (see below), whose sum is σ = 2607323040. Its totient is φ = 496632576.

The previous prime is 1231235381. The next prime is 1231235417. The reversal of 1231235404 is 4045321321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1292839 + ... + 1293790.

It is an arithmetic number, because the mean of its divisors is an integer number (108638460).

Almost surely, 2^1231235404 is an apocalyptic number.

1231235404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1231235404 is an abundant number, since it is smaller than the sum of its proper divisors (1376087636).

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

1231235404 is a wasteful number, since it uses less digits than its factorization.

1231235404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586657 (or 2586655 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1231235404 is about 35088.9641340408. The cubic root of 1231235404 is about 1071.7998658745.

Adding to 1231235404 its reverse (4045321321), we get a palindrome (5276556725).

The spelling of 1231235404 in words is "one billion, two hundred thirty-one million, two hundred thirty-five thousand, four hundred four".