12171340 has 24 divisors (see below), whose sum is σ = 25683840. Its totient is φ = 4844928.

The previous prime is 12171319. The next prime is 12171353. The reversal of 12171340 is 4317121.

12171340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3096 + ... + 5824.

It is an arithmetic number, because the mean of its divisors is an integer number (1070160).

Almost surely, 2^12171340 is an apocalyptic number.

12171340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12171340 is an abundant number, since it is smaller than the sum of its proper divisors (13512500).

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

12171340 is a wasteful number, since it uses less digits than its factorization.

12171340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961 (or 2959 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 12171340 is about 3488.7447599387. The cubic root of 12171340 is about 230.0273439450.

Adding to 12171340 its reverse (4317121), we get a palindrome (16488461).

The spelling of 12171340 in words is "twelve million, one hundred seventy-one thousand, three hundred forty".