11539121 has 4 divisors (see below), whose sum is σ = 12588144. Its totient is φ = 10490100.

The previous prime is 11539069. The next prime is 11539127. The reversal of 11539121 is 12193511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12193511 = 11 ⋅1108501.

It is a cyclic number.

It is not a de Polignac number, because 11539121 - 2⁶ = 11539057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11539127) 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, 524495 + ... + 524516.

It is an arithmetic number, because the mean of its divisors is an integer number (3147036).

Almost surely, 2^11539121 is an apocalyptic number.

11539121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11539121 is a deficient number, since it is larger than the sum of its proper divisors (1049023).

11539121 is a wasteful number, since it uses less digits than its factorization.

11539121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049022.

The product of its digits is 270, while the sum is 23.

The square root of 11539121 is about 3396.9281711570. The cubic root of 11539121 is about 225.9735330689.

The spelling of 11539121 in words is "eleven million, five hundred thirty-nine thousand, one hundred twenty-one".