12420922 has 4 divisors (see below), whose sum is σ = 18631386. Its totient is φ = 6210460.

The previous prime is 12420917. The next prime is 12420923. The reversal of 12420922 is 22902421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7845601 + 4575321 = 2801^2 + 2139^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12420893 and 12420902.

It is not an unprimeable number, because it can be changed into a prime (12420923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105229 + ... + 3105232.

Almost surely, 2^12420922 is an apocalyptic number.

12420922 is a deficient number, since it is larger than the sum of its proper divisors (6210464).

12420922 is an equidigital number, since it uses as much as digits as its factorization.

12420922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210463.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12420922 is about 3524.3328446672. The cubic root of 12420922 is about 231.5890092754.

The spelling of 12420922 in words is "twelve million, four hundred twenty thousand, nine hundred twenty-two".