12555422 has 16 divisors (see below), whose sum is σ = 20658672. Its totient is φ = 5675520.

The previous prime is 12555397. The next prime is 12555443. The reversal of 12555422 is 22455521.

It is a junction number, because it is equal to n+sod(n) for n = 12555391 and 12555400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2768 + ... + 5724.

It is an arithmetic number, because the mean of its divisors is an integer number (1291167).

Almost surely, 2^12555422 is an apocalyptic number.

12555422 is a deficient number, since it is larger than the sum of its proper divisors (8103250).

12555422 is a wasteful number, since it uses less digits than its factorization.

12555422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163.

The product of its digits is 4000, while the sum is 26.

The square root of 12555422 is about 3543.3630917534. The cubic root of 12555422 is about 232.4219308551.

Subtracting 12555422 from its reverse (22455521), we obtain a palindrome (9900099).

The spelling of 12555422 in words is "twelve million, five hundred fifty-five thousand, four hundred twenty-two".