1231404 has 24 divisors (see below), whose sum is σ = 2908080. Its totient is φ = 405504.

The previous prime is 1231387. The next prime is 1231411. The reversal of 1231404 is 4041321.

It is a super-2 number, since 2×1231404² = 3032711622432, which contains 22 as substring.

It is a zygodrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492 + ... + 1644.

It is an arithmetic number, because the mean of its divisors is an integer number (121170).

2^1231404 is an apocalyptic number.

It is an amenable number.

1231404 is an abundant number, since it is smaller than the sum of its proper divisors (1676676).

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

1231404 is a wasteful number, since it uses less digits than its factorization.

1231404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1231404 is about 1109.6864421989. The cubic root of 1231404 is about 107.1848785012.

Adding to 1231404 its reverse (4041321), we get a palindrome (5272725).

The spelling of 1231404 in words is "one million, two hundred thirty-one thousand, four hundred four".