12420297 has 10 divisors (see below), whose sum is σ = 18553898. Its totient is φ = 8280144.

The previous prime is 12420277. The next prime is 12420311. The reversal of 12420297 is 79202421.

12420297 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 can be written as a sum of positive squares in only one way, i.e., 9308601 + 3111696 = 3051^2 + 1764^2 .

It is not a de Polignac number, because 12420297 - 2⁸ = 12420041 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12420297.

It is not an unprimeable number, because it can be changed into a prime (12420227) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76588 + ... + 76749.

Almost surely, 2^12420297 is an apocalyptic number.

It is an amenable number.

12420297 is a deficient number, since it is larger than the sum of its proper divisors (6133601).

12420297 is an equidigital number, since it uses as much as digits as its factorization.

12420297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153349 (or 153340 counting only the distinct ones).

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

The square root of 12420297 is about 3524.2441742876. The cubic root of 12420297 is about 231.5851248198.

The spelling of 12420297 in words is "twelve million, four hundred twenty thousand, two hundred ninety-seven".