12161493 has 24 divisors (see below), whose sum is σ = 18376800. Its totient is φ = 7742304.

The previous prime is 12161489. The next prime is 12161521. The reversal of 12161493 is 39416121.

12161493 is a `hidden beast` number, since 12 + 161 + 493 = 666.

It is not a de Polignac number, because 12161493 - 2² = 12161489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19338 + ... + 19956.

It is an arithmetic number, because the mean of its divisors is an integer number (765700).

Almost surely, 2^12161493 is an apocalyptic number.

It is an amenable number.

12161493 is a deficient number, since it is larger than the sum of its proper divisors (6215307).

12161493 is a wasteful number, since it uses less digits than its factorization.

12161493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 718 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 12161493 is about 3487.3332218186. Note that the first 3 decimals coincide. The cubic root of 12161493 is about 229.9652940702.

The spelling of 12161493 in words is "twelve million, one hundred sixty-one thousand, four hundred ninety-three".