12290865 has 8 divisors (see below), whose sum is σ = 19665408. Its totient is φ = 6555120.

The previous prime is 12290851. The next prime is 12290893. The reversal of 12290865 is 56809221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12290865 - 2⁵ = 12290833 is a prime.

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, 409681 + ... + 409710.

It is an arithmetic number, because the mean of its divisors is an integer number (2458176).

Almost surely, 2^12290865 is an apocalyptic number.

12290865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12290865 is a deficient number, since it is larger than the sum of its proper divisors (7374543).

12290865 is an equidigital number, since it uses as much as digits as its factorization.

12290865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819399.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 12290865 is about 3505.8329965930. The cubic root of 12290865 is about 230.7778640787. Note that the first 3 decimals are identical.

The spelling of 12290865 in words is "twelve million, two hundred ninety thousand, eight hundred sixty-five".