12170140 has 24 divisors (see below), whose sum is σ = 26439840. Its totient is φ = 4699968.

The previous prime is 12170131. The next prime is 12170143. The reversal of 12170140 is 4107121.

It is a super-2 number, since 2×12170140² = 296224615239200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12170143) 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, 9912 + ... + 11071.

It is an arithmetic number, because the mean of its divisors is an integer number (1101660).

Almost surely, 2^12170140 is an apocalyptic number.

12170140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12170140 is an abundant number, since it is smaller than the sum of its proper divisors (14269700).

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

12170140 is a wasteful number, since it uses less digits than its factorization.

12170140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21021 (or 21019 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12170140 is about 3488.5727740725. The cubic root of 12170140 is about 230.0197840575.

Adding to 12170140 its reverse (4107121), we get a palindrome (16277261).

The spelling of 12170140 in words is "twelve million, one hundred seventy thousand, one hundred forty".