12290646 has 16 divisors (see below), whose sum is σ = 24985008. Its totient is φ = 4029600.

The previous prime is 12290639. The next prime is 12290651. The reversal of 12290646 is 64609221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16425 + ... + 17156.

It is an arithmetic number, because the mean of its divisors is an integer number (1561563).

Almost surely, 2^12290646 is an apocalyptic number.

12290646 is an abundant number, since it is smaller than the sum of its proper divisors (12694362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12290646 is a wasteful number, since it uses less digits than its factorization.

12290646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33647.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 12290646 is about 3505.8017627926. The cubic root of 12290646 is about 230.7764933954.

Adding to 12290646 its reverse (64609221), we get a palindrome (76899867).

The spelling of 12290646 in words is "twelve million, two hundred ninety thousand, six hundred forty-six".