12181364 has 24 divisors (see below), whose sum is σ = 23278920. Its totient is φ = 5543424.

The previous prime is 12181343. The next prime is 12181369. The reversal of 12181364 is 46318121.

It can be written as a sum of positive squares in 4 ways, for example, as 824464 + 11356900 = 908^2 + 3370^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181369) 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, 2192 + ... + 5400.

It is an arithmetic number, because the mean of its divisors is an integer number (969955).

Almost surely, 2^12181364 is an apocalyptic number.

It is an amenable number.

12181364 is a deficient number, since it is larger than the sum of its proper divisors (11097556).

12181364 is a wasteful number, since it uses less digits than its factorization.

12181364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3297 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 12181364 is about 3490.1810841273. The cubic root of 12181364 is about 230.0904748024.

Adding to 12181364 its reverse (46318121), we get a palindrome (58499485).

The spelling of 12181364 in words is "twelve million, one hundred eighty-one thousand, three hundred sixty-four".