12209427 has 8 divisors (see below), whose sum is σ = 18088080. Its totient is φ = 8139600.

The previous prime is 12209423. The next prime is 12209429. The reversal of 12209427 is 72490221.

12209427 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12209427 - 2² = 12209423 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: 452201 = 12209427 / (1 + 2 + 2 + 0 + 9 + 4 + 2 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 12209427.

It is not an unprimeable number, because it can be changed into a prime (12209423) 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, 226074 + ... + 226127.

It is an arithmetic number, because the mean of its divisors is an integer number (2261010).

Almost surely, 2^12209427 is an apocalyptic number.

12209427 is a deficient number, since it is larger than the sum of its proper divisors (5878653).

12209427 is an equidigital number, since it uses as much as digits as its factorization.

12209427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452210 (or 452204 counting only the distinct ones).

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

The square root of 12209427 is about 3494.1990498539. The cubic root of 12209427 is about 230.2670307512.

Adding to 12209427 its reverse (72490221), we get a palindrome (84699648).

The spelling of 12209427 in words is "twelve million, two hundred nine thousand, four hundred twenty-seven".