12161039 has 4 divisors (see below), whose sum is σ = 13266600. Its totient is φ = 11055480.

The previous prime is 12161029. The next prime is 12161041. The reversal of 12161039 is 93016121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93016121 = 11 ⋅8456011.

It is a cyclic number.

It is not a de Polignac number, because 12161039 - 2⁸ = 12160783 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 (12161029) 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 3 ways as a sum of consecutive naturals, for example, 552764 + ... + 552785.

It is an arithmetic number, because the mean of its divisors is an integer number (3316650).

Almost surely, 2^12161039 is an apocalyptic number.

12161039 is a deficient number, since it is larger than the sum of its proper divisors (1105561).

12161039 is a wasteful number, since it uses less digits than its factorization.

12161039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105560.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 12161039 is about 3487.2681284926. The cubic root of 12161039 is about 229.9624324275.

It can be divided in two parts, 12 and 161039, that added together give a 5-th power (161051 = 11⁵).

The spelling of 12161039 in words is "twelve million, one hundred sixty-one thousand, thirty-nine".