12161965 has 8 divisors (see below), whose sum is σ = 14842080. Its totient is φ = 9564432.

The previous prime is 12161927. The next prime is 12161977. The reversal of 12161965 is 56916121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12161965 - 2⁹ = 12161453 is a prime.

It is a super-2 number, since 2×12161965² = 295826785322450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20319 + ... + 20908.

It is an arithmetic number, because the mean of its divisors is an integer number (1855260).

Almost surely, 2^12161965 is an apocalyptic number.

It is an amenable number.

12161965 is a deficient number, since it is larger than the sum of its proper divisors (2680115).

12161965 is an equidigital number, since it uses as much as digits as its factorization.

12161965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41291.

The product of its digits is 3240, while the sum is 31.

The square root of 12161965 is about 3487.4008946492. The cubic root of 12161965 is about 229.9682690946.

The spelling of 12161965 in words is "twelve million, one hundred sixty-one thousand, nine hundred sixty-five".