12378231 has 16 divisors (see below), whose sum is σ = 18520320. Its totient is φ = 8170200.

The previous prime is 12378199. The next prime is 12378241. The reversal of 12378231 is 13287321.

It is not a de Polignac number, because 12378231 - 2⁵ = 12378199 is a prime.

It is a super-2 number, since 2×12378231² = 306441205378722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 12378195 and 12378204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12378241) 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, 556 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (1157520).

Almost surely, 2^12378231 is an apocalyptic number.

12378231 is a deficient number, since it is larger than the sum of its proper divisors (6142089).

12378231 is a wasteful number, since it uses less digits than its factorization.

12378231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4563 (or 4557 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12378231 is about 3518.2710242390. The cubic root of 12378231 is about 231.3233790994.

The spelling of 12378231 in words is "twelve million, three hundred seventy-eight thousand, two hundred thirty-one".