11231409 has 16 divisors (see below), whose sum is σ = 17269632. Its totient is φ = 6359808.

The previous prime is 11231399. The next prime is 11231431. The reversal of 11231409 is 90413211.

It is not a de Polignac number, because 11231409 - 2⁵ = 11231377 is a prime.

It is a super-2 number, since 2×11231409² = 252289096250562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11231459) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7 + ... + 4739.

It is an arithmetic number, because the mean of its divisors is an integer number (1079352).

Almost surely, 2^11231409 is an apocalyptic number.

It is an amenable number.

11231409 is a deficient number, since it is larger than the sum of its proper divisors (6038223).

11231409 is a wasteful number, since it uses less digits than its factorization.

11231409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4856.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 11231409 is about 3351.3294377008. The cubic root of 11231409 is about 223.9467414304.

Adding to 11231409 its sum of digits (21), we get a triangular number (11231430 = T₄₇₃₉).

The spelling of 11231409 in words is "eleven million, two hundred thirty-one thousand, four hundred nine".