12181764 has 24 divisors (see below), whose sum is σ = 32484928. Its totient is φ = 3480480.

The previous prime is 12181759. The next prime is 12181781. The reversal of 12181764 is 46718121.

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, 72427 + ... + 72594.

Almost surely, 2^12181764 is an apocalyptic number.

12181764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12181764 is an abundant number, since it is smaller than the sum of its proper divisors (20303164).

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

12181764 is a wasteful number, since it uses less digits than its factorization.

12181764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145035 (or 145033 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 12181764 is about 3490.2383872739. The cubic root of 12181764 is about 230.0929932719.

Adding to 12181764 its reverse (46718121), we get a palindrome (58899885).

The spelling of 12181764 in words is "twelve million, one hundred eighty-one thousand, seven hundred sixty-four".