12290643 has 16 divisors (see below), whose sum is σ = 19280160. Its totient is φ = 7711488.

The previous prime is 12290639. The next prime is 12290651. The reversal of 12290643 is 34609221.

12290643 is a `hidden beast` number, since 12 + 2 + 9 + 0 + 643 = 666.

It is not a de Polignac number, because 12290643 - 2² = 12290639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12290653) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12930 + ... + 13847.

It is an arithmetic number, because the mean of its divisors is an integer number (1205010).

Almost surely, 2^12290643 is an apocalyptic number.

12290643 is a deficient number, since it is larger than the sum of its proper divisors (6989517).

12290643 is a wasteful number, since it uses less digits than its factorization.

12290643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26803 (or 26797 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 12290643 is about 3505.8013349304. The cubic root of 12290643 is about 230.7764746188.

Adding to 12290643 its reverse (34609221), we get a palindrome (46899864).

The spelling of 12290643 in words is "twelve million, two hundred ninety thousand, six hundred forty-three".