11405231 has 8 divisors (see below), whose sum is σ = 11792400. Its totient is φ = 11024640.

The previous prime is 11405201. The next prime is 11405239. The reversal of 11405231 is 13250411.

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

It is a cyclic number.

It is not a de Polignac number, because 11405231 - 2⁶ = 11405167 is a prime.

It is a super-2 number, since 2×11405231² = 260158588326722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11405239) 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, 2015 + ... + 5183.

It is an arithmetic number, because the mean of its divisors is an integer number (1474050).

Almost surely, 2^11405231 is an apocalyptic number.

11405231 is a deficient number, since it is larger than the sum of its proper divisors (387169).

11405231 is an equidigital number, since it uses as much as digits as its factorization.

11405231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 11405231 is about 3377.1631586289. The cubic root of 11405231 is about 225.0961301165.

Adding to 11405231 its reverse (13250411), we get a palindrome (24655642).

The spelling of 11405231 in words is "eleven million, four hundred five thousand, two hundred thirty-one".