12398542 has 16 divisors (see below), whose sum is σ = 21207312. Its totient is φ = 5385600.

The previous prime is 12398537. The next prime is 12398549. The reversal of 12398542 is 24589321.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 12398498 and 12398507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12398549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13584 + ... + 14467.

It is an arithmetic number, because the mean of its divisors is an integer number (1325457).

Almost surely, 2^12398542 is an apocalyptic number.

12398542 is a deficient number, since it is larger than the sum of its proper divisors (8808770).

12398542 is a wasteful number, since it uses less digits than its factorization.

12398542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28083.

The product of its digits is 17280, while the sum is 34.

The square root of 12398542 is about 3521.1563441574. The cubic root of 12398542 is about 231.4498334012.

The spelling of 12398542 in words is "twelve million, three hundred ninety-eight thousand, five hundred forty-two".