11291239 has 4 divisors (see below), whose sum is σ = 11303320. Its totient is φ = 11279160.

The previous prime is 11291221. The next prime is 11291249. The reversal of 11291239 is 93219211.

11291239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11291239 - 2¹¹ = 11289191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11291209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4509 + ... + 6550.

It is an arithmetic number, because the mean of its divisors is an integer number (2825830).

Almost surely, 2^11291239 is an apocalyptic number.

11291239 is a deficient number, since it is larger than the sum of its proper divisors (12081).

11291239 is a wasteful number, since it uses less digits than its factorization.

11291239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12080.

The product of its digits is 972, while the sum is 28.

The square root of 11291239 is about 3360.2438899580. The cubic root of 11291239 is about 224.3436940569.

The spelling of 11291239 in words is "eleven million, two hundred ninety-one thousand, two hundred thirty-nine".