12161599 has 2 divisors, whose sum is σ = 12161600. Its totient is φ = 12161598.

The previous prime is 12161587. The next prime is 12161623. The reversal of 12161599 is 99516121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12161599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12161099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6080799 + 6080800.

It is an arithmetic number, because the mean of its divisors is an integer number (6080800).

Almost surely, 2^12161599 is an apocalyptic number.

12161599 is a deficient number, since it is larger than the sum of its proper divisors (1).

12161599 is an equidigital number, since it uses as much as digits as its factorization.

12161599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 34.

The square root of 12161599 is about 3487.3484196449. The cubic root of 12161599 is about 229.9659621968.

The spelling of 12161599 in words is "twelve million, one hundred sixty-one thousand, five hundred ninety-nine".