12378542 has 12 divisors (see below), whose sum is σ = 20409648. Its totient is φ = 5626500.

The previous prime is 12378529. The next prime is 12378559. The reversal of 12378542 is 24587321.

It is a junction number, because it is equal to n+sod(n) for n = 12378499 and 12378508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25334 + ... + 25817.

It is an arithmetic number, because the mean of its divisors is an integer number (1700804).

Almost surely, 2^12378542 is an apocalyptic number.

12378542 is a deficient number, since it is larger than the sum of its proper divisors (8031106).

12378542 is a wasteful number, since it uses less digits than its factorization.

12378542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51175 (or 51164 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 12378542 is about 3518.3152218072. The cubic root of 12378542 is about 231.3253163975.

It can be divided in two parts, 1237 and 8542, that added together give a palindrome (9779).

The spelling of 12378542 in words is "twelve million, three hundred seventy-eight thousand, five hundred forty-two".