12040919 has 4 divisors (see below), whose sum is σ = 13135560. Its totient is φ = 10946280.

The previous prime is 12040909. The next prime is 12040957. The reversal of 12040919 is 91904021.

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

It is a cyclic number.

It is not a de Polignac number, because 12040919 - 2²⁰ = 10992343 is a prime.

It is a super-2 number, since 2×12040919² = 289967460729122, 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 (12040909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547304 + ... + 547325.

It is an arithmetic number, because the mean of its divisors is an integer number (3283890).

Almost surely, 2^12040919 is an apocalyptic number.

12040919 is a deficient number, since it is larger than the sum of its proper divisors (1094641).

12040919 is a wasteful number, since it uses less digits than its factorization.

12040919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094640.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12040919 is about 3470.0027377511. The cubic root of 12040919 is about 229.2027786324.

The spelling of 12040919 in words is "twelve million, forty thousand, nine hundred nineteen".