12220497 has 8 divisors (see below), whose sum is σ = 18104480. Its totient is φ = 8146980.

The previous prime is 12220489. The next prime is 12220519. The reversal of 12220497 is 79402221.

12220497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12220497 - 2³ = 12220489 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: 452611 = 12220497 / (1 + 2 + 2 + 2 + 0 + 4 + 9 + 7).

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 12220497.

It is not an unprimeable number, because it can be changed into a prime (12220427) 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, 226279 + ... + 226332.

It is an arithmetic number, because the mean of its divisors is an integer number (2263060).

Almost surely, 2^12220497 is an apocalyptic number.

It is an amenable number.

12220497 is a deficient number, since it is larger than the sum of its proper divisors (5883983).

12220497 is an equidigital number, since it uses as much as digits as its factorization.

12220497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452620 (or 452614 counting only the distinct ones).

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

The square root of 12220497 is about 3495.7827449657. The cubic root of 12220497 is about 230.3366022943.

The spelling of 12220497 in words is "twelve million, two hundred twenty thousand, four hundred ninety-seven".