12112290 has 24 divisors (see below), whose sum is σ = 31492188. Its totient is φ = 3229920.

The previous prime is 12112271. The next prime is 12112297. The reversal of 12112290 is 9221121.

It can be written as a sum of positive squares in 2 ways, for example, as 11350161 + 762129 = 3369^2 + 873^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12112297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67201 + ... + 67380.

Almost surely, 2^12112290 is an apocalyptic number.

12112290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12112290 is an abundant number, since it is smaller than the sum of its proper divisors (19379898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12112290 is a wasteful number, since it uses less digits than its factorization.

12112290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134594 (or 134591 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12112290 is about 3480.2715411301. The cubic root of 12112290 is about 229.6547434892.

The spelling of 12112290 in words is "twelve million, one hundred twelve thousand, two hundred ninety".