12065919 has 4 divisors (see below), whose sum is σ = 16087896. Its totient is φ = 8043944.

The previous prime is 12065897. The next prime is 12065939. The reversal of 12065919 is 91956021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91956021 = 3 ⋅30652007.

It is a cyclic number.

It is not a de Polignac number, because 12065919 - 2⁷ = 12065791 is a prime.

It is a super-2 number, since 2×12065919² = 291172802629122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12065919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12065939) 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, 2010984 + ... + 2010989.

It is an arithmetic number, because the mean of its divisors is an integer number (4021974).

Almost surely, 2^12065919 is an apocalyptic number.

12065919 is a deficient number, since it is larger than the sum of its proper divisors (4021977).

12065919 is an equidigital number, since it uses as much as digits as its factorization.

12065919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021976.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 12065919 is about 3473.6031724997. The cubic root of 12065919 is about 229.3612966642.

The spelling of 12065919 in words is "twelve million, sixty-five thousand, nine hundred nineteen".