12326781 has 16 divisors (see below), whose sum is σ = 17247744. Its totient is φ = 7815984.

The previous prime is 12326779. The next prime is 12326791. The reversal of 12326781 is 18762321.

It is not a de Polignac number, because 12326781 - 2¹ = 12326779 is a prime.

It is a super-2 number, since 2×12326781² = 303899059643922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12326761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15270 + ... + 16056.

It is an arithmetic number, because the mean of its divisors is an integer number (1077984).

Almost surely, 2^12326781 is an apocalyptic number.

It is an amenable number.

12326781 is a deficient number, since it is larger than the sum of its proper divisors (4920963).

12326781 is a wasteful number, since it uses less digits than its factorization.

12326781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its digits is 4032, while the sum is 30.

The square root of 12326781 is about 3510.9515804124. The cubic root of 12326781 is about 231.0024362105.

The spelling of 12326781 in words is "twelve million, three hundred twenty-six thousand, seven hundred eighty-one".