12405442 has 32 divisors (see below), whose sum is σ = 22608000. Its totient is φ = 4987008.

The previous prime is 12405433. The next prime is 12405467. The reversal of 12405442 is 24450421.

It is a happy number.

12405442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39478 + ... + 39790.

It is an arithmetic number, because the mean of its divisors is an integer number (706500).

Almost surely, 2^12405442 is an apocalyptic number.

12405442 is a deficient number, since it is larger than the sum of its proper divisors (10202558).

12405442 is a wasteful number, since it uses less digits than its factorization.

12405442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 12405442 is about 3522.1359996457. The cubic root of 12405442 is about 231.4927606983.

Adding to 12405442 its reverse (24450421), we get a palindrome (36855863).

The spelling of 12405442 in words is "twelve million, four hundred five thousand, four hundred forty-two".