1231405104 has 40 divisors (see below), whose sum is σ = 3255115072. Its totient is φ = 400921920.

The previous prime is 1231405093. The next prime is 1231405121. The reversal of 1231405104 is 4015041321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296242 + ... + 300369.

Almost surely, 2^1231405104 is an apocalyptic number.

It is an amenable number.

1231405104 is an abundant number, since it is smaller than the sum of its proper divisors (2023709968).

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

1231405104 is a wasteful number, since it uses less digits than its factorization.

1231405104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596665 (or 596659 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1231405104 is about 35091.3821899338. The cubic root of 1231405104 is about 1071.8491053297.

Adding to 1231405104 its reverse (4015041321), we get a palindrome (5246446425).

The spelling of 1231405104 in words is "one billion, two hundred thirty-one million, four hundred five thousand, one hundred four".