12378357 has 6 divisors (see below), whose sum is σ = 17879862. Its totient is φ = 8252232.

The previous prime is 12378349. The next prime is 12378403. The reversal of 12378357 is 75387321.

It can be written as a sum of positive squares in only one way, i.e., 11350161 + 1028196 = 3369^2 + 1014^2 .

It is not a de Polignac number, because 12378357 - 2³ = 12378349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12378307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 687678 + ... + 687695.

It is an arithmetic number, because the mean of its divisors is an integer number (2979977).

Almost surely, 2^12378357 is an apocalyptic number.

It is an amenable number.

12378357 is a deficient number, since it is larger than the sum of its proper divisors (5501505).

12378357 is a wasteful number, since it uses less digits than its factorization.

12378357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375379 (or 1375376 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 12378357 is about 3518.2889307162. The cubic root of 12378357 is about 231.3241639894.

The spelling of 12378357 in words is "twelve million, three hundred seventy-eight thousand, three hundred fifty-seven".