12161584 has 20 divisors (see below), whose sum is σ = 24139080. Its totient is φ = 5932160.

The previous prime is 12161573. The next prime is 12161587. The reversal of 12161584 is 48516121.

12161584 is a modest number, since divided by 1584 gives 1216 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12161587) 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, 8614 + ... + 9925.

It is an arithmetic number, because the mean of its divisors is an integer number (1206954).

Almost surely, 2^12161584 is an apocalyptic number.

It is an amenable number.

12161584 is a deficient number, since it is larger than the sum of its proper divisors (11977496).

12161584 is a wasteful number, since it uses less digits than its factorization.

12161584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18588 (or 18582 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 12161584 is about 3487.3462690132. The cubic root of 12161584 is about 229.9658676508.

It can be divided in two parts, 12 and 161584, that added together give a triangular number (161596 = T₅₆₈).

The spelling of 12161584 in words is "twelve million, one hundred sixty-one thousand, five hundred eighty-four".