12181374 has 16 divisors (see below), whose sum is σ = 27069840. Its totient is φ = 4060440.

The previous prime is 12181373. The next prime is 12181381. The reversal of 12181374 is 47318121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181373) 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, 112737 + ... + 112844.

It is an arithmetic number, because the mean of its divisors is an integer number (1691865).

Almost surely, 2^12181374 is an apocalyptic number.

12181374 is an abundant number, since it is smaller than the sum of its proper divisors (14888466).

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

12181374 is a wasteful number, since it uses less digits than its factorization.

12181374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225592 (or 225586 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 12181374 is about 3490.1825167174. The cubic root of 12181374 is about 230.0905377648.

Adding to 12181374 its reverse (47318121), we get a palindrome (59499495).

The spelling of 12181374 in words is "twelve million, one hundred eighty-one thousand, three hundred seventy-four".