12071919 has 4 divisors (see below), whose sum is σ = 16095896. Its totient is φ = 8047944.

The previous prime is 12071869. The next prime is 12071923. The reversal of 12071919 is 91917021.

12071919 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12071919 - 2⁸ = 12071663 is a prime.

It is a super-2 number, since 2×12071919² = 291462456685122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12071959) 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, 2011984 + ... + 2011989.

It is an arithmetic number, because the mean of its divisors is an integer number (4023974).

Almost surely, 2^12071919 is an apocalyptic number.

12071919 is a deficient number, since it is larger than the sum of its proper divisors (4023977).

12071919 is an equidigital number, since it uses as much as digits as its factorization.

12071919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023976.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 12071919 is about 3474.4667216711. The cubic root of 12071919 is about 229.3993084044.

The spelling of 12071919 in words is "twelve million, seventy-one thousand, nine hundred nineteen".