1231404403 has 8 divisors (see below), whose sum is σ = 1240576272. Its totient is φ = 1222265856.

The previous prime is 1231404341. The next prime is 1231404407. The reversal of 1231404403 is 3044041321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231404403 is a prime.

It is a super-3 number, since 3×1231404403³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231404407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68451 + ... + 84547.

It is an arithmetic number, because the mean of its divisors is an integer number (155072034).

Almost surely, 2^1231404403 is an apocalyptic number.

1231404403 is a deficient number, since it is larger than the sum of its proper divisors (9171869).

1231404403 is a wasteful number, since it uses less digits than its factorization.

1231404403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16661.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1231404403 is about 35091.3722017250. The cubic root of 1231404403 is about 1071.8489019397.

Adding to 1231404403 its reverse (3044041321), we get a palindrome (4275445724).

The spelling of 1231404403 in words is "one billion, two hundred thirty-one million, four hundred four thousand, four hundred three".