12420219 has 16 divisors (see below), whose sum is σ = 19079168. Its totient is φ = 7039872.

The previous prime is 12420211. The next prime is 12420227. The reversal of 12420219 is 91202421.

It is an interprime number because it is at equal distance from previous prime (12420211) and next prime (12420227).

It is not a de Polignac number, because 12420219 - 2³ = 12420211 is a prime.

It is a super-2 number, since 2×12420219² = 308523680015922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12420195 and 12420204.

It is not an unprimeable number, because it can be changed into a prime (12420211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339 + ... + 4995.

It is an arithmetic number, because the mean of its divisors is an integer number (1192448).

Almost surely, 2^12420219 is an apocalyptic number.

12420219 is a deficient number, since it is larger than the sum of its proper divisors (6658949).

12420219 is a wasteful number, since it uses less digits than its factorization.

12420219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 12420219 is about 3524.2331080676. The cubic root of 12420219 is about 231.5846400306.

The spelling of 12420219 in words is "twelve million, four hundred twenty thousand, two hundred nineteen".