12157219 has 2 divisors, whose sum is σ = 12157220. Its totient is φ = 12157218.

The previous prime is 12157199. The next prime is 12157237. The reversal of 12157219 is 91275121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12157219 is a prime.

It is a super-2 number, since 2×12157219² = 295595947627922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12157319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078609 + 6078610.

It is an arithmetic number, because the mean of its divisors is an integer number (6078610).

Almost surely, 2^12157219 is an apocalyptic number.

12157219 is a deficient number, since it is larger than the sum of its proper divisors (1).

12157219 is an equidigital number, since it uses as much as digits as its factorization.

12157219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 28.

The square root of 12157219 is about 3486.7203788087. The cubic root of 12157219 is about 229.9383514673.

The spelling of 12157219 in words is "twelve million, one hundred fifty-seven thousand, two hundred nineteen".