12090819 has 8 divisors (see below), whose sum is σ = 17361232. Its totient is φ = 7440480.

The previous prime is 12090817. The next prime is 12090853. The reversal of 12090819 is 91809021.

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

It is not a de Polignac number, because 12090819 - 2¹ = 12090817 is a prime.

It is a super-2 number, since 2×12090819² = 292375808181522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12090817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154972 + ... + 155049.

It is an arithmetic number, because the mean of its divisors is an integer number (2170154).

Almost surely, 2^12090819 is an apocalyptic number.

12090819 is a deficient number, since it is larger than the sum of its proper divisors (5270413).

12090819 is a wasteful number, since it uses less digits than its factorization.

12090819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310037.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 12090819 is about 3477.1854997972. The cubic root of 12090819 is about 229.5189631238.

The spelling of 12090819 in words is "twelve million, ninety thousand, eight hundred nineteen".