12290427 has 8 divisors (see below), whose sum is σ = 18208080. Its totient is φ = 8193600.

The previous prime is 12290423. The next prime is 12290429. The reversal of 12290427 is 72409221.

It is not a de Polignac number, because 12290427 - 2² = 12290423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 455201 = 12290427 / (1 + 2 + 2 + 9 + 0 + 4 + 2 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 12290427.

It is not an unprimeable number, because it can be changed into a prime (12290423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227574 + ... + 227627.

It is an arithmetic number, because the mean of its divisors is an integer number (2276010).

Almost surely, 2^12290427 is an apocalyptic number.

12290427 is a deficient number, since it is larger than the sum of its proper divisors (5917653).

12290427 is an equidigital number, since it uses as much as digits as its factorization.

12290427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455210 (or 455204 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12290427 is about 3505.7705287141. The cubic root of 12290427 is about 230.7751226957.

Adding to 12290427 its reverse (72409221), we get a palindrome (84699648).

The spelling of 12290427 in words is "twelve million, two hundred ninety thousand, four hundred twenty-seven".