12181326 has 32 divisors (see below), whose sum is σ = 25497600. Its totient is φ = 3875040.

The previous prime is 12181313. The next prime is 12181339. The reversal of 12181326 is 62318121.

It is an interprime number because it is at equal distance from previous prime (12181313) and next prime (12181339).

It is a junction number, because it is equal to n+sod(n) for n = 12181296 and 12181305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14280 + ... + 15108.

It is an arithmetic number, because the mean of its divisors is an integer number (796800).

Almost surely, 2^12181326 is an apocalyptic number.

12181326 is an abundant number, since it is smaller than the sum of its proper divisors (13316274).

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

12181326 is a wasteful number, since it uses less digits than its factorization.

12181326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944.

The product of its digits is 576, while the sum is 24.

The square root of 12181326 is about 3490.1756402794. The cubic root of 12181326 is about 230.0902355449.

Adding to 12181326 its reverse (62318121), we get a palindrome (74499447).

The spelling of 12181326 in words is "twelve million, one hundred eighty-one thousand, three hundred twenty-six".