12105390 has 32 divisors (see below), whose sum is σ = 31694976. Its totient is φ = 2934560.

The previous prime is 12105361. The next prime is 12105391. The reversal of 12105390 is 9350121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18012 + ... + 18671.

It is an arithmetic number, because the mean of its divisors is an integer number (990468).

Almost surely, 2^12105390 is an apocalyptic number.

12105390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12105390 is an abundant number, since it is smaller than the sum of its proper divisors (19589586).

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

12105390 is a wasteful number, since it uses less digits than its factorization.

12105390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36704.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 12105390 is about 3479.2800979513. The cubic root of 12105390 is about 229.6111261185.

Adding to 12105390 its product of nonzero digits (270), we get a triangular number (12105660 = T₄₉₂₀).

The spelling of 12105390 in words is "twelve million, one hundred five thousand, three hundred ninety".