12171090 has 16 divisors (see below), whose sum is σ = 29210688. Its totient is φ = 3245616.

The previous prime is 12171067. The next prime is 12171101. The reversal of 12171090 is 9017121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202822 + ... + 202881.

It is an arithmetic number, because the mean of its divisors is an integer number (1825668).

Almost surely, 2^12171090 is an apocalyptic number.

12171090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12171090 is an abundant number, since it is smaller than the sum of its proper divisors (17039598).

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

12171090 is a wasteful number, since it uses less digits than its factorization.

12171090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405713.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 12171090 is about 3488.7089302491. The cubic root of 12171090 is about 230.0257690094.

The spelling of 12171090 in words is "twelve million, one hundred seventy-one thousand, ninety".