12109090 has 16 divisors (see below), whose sum is σ = 24910272. Its totient is φ = 4151664.

The previous prime is 12109067. The next prime is 12109091. The reversal of 12109090 is 9090121.

It is an alternating number because its digits alternate between odd and even.

12109090 is a modest number, since divided by 9090 gives 1210 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12109091) 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, 86424 + ... + 86563.

It is an arithmetic number, because the mean of its divisors is an integer number (1556892).

Almost surely, 2^12109090 is an apocalyptic number.

12109090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12109090 is an abundant number, since it is smaller than the sum of its proper divisors (12801182).

12109090 is a wasteful number, since it uses less digits than its factorization.

12109090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173001.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 12109090 is about 3479.8117765190. The cubic root of 12109090 is about 229.6345172037.

The spelling of 12109090 in words is "twelve million, one hundred nine thousand, ninety".