12780022 has 16 divisors (see below), whose sum is σ = 20848320. Its totient is φ = 5851008.

The previous prime is 12780017. The next prime is 12780113. The reversal of 12780022 is 22008721.

It is a junction number, because it is equal to n+sod(n) for n = 12779975 and 12780002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3822 + ... + 6337.

It is an arithmetic number, because the mean of its divisors is an integer number (1303020).

Almost surely, 2^12780022 is an apocalyptic number.

12780022 is a deficient number, since it is larger than the sum of its proper divisors (8068298).

12780022 is a wasteful number, since it uses less digits than its factorization.

12780022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 12780022 is about 3574.9156633409. The cubic root of 12780022 is about 233.7996556314.

Adding to 12780022 its reverse (22008721), we get a palindrome (34788743).

The spelling of 12780022 in words is "twelve million, seven hundred eighty thousand, twenty-two".