42421619 has 2 divisors, whose sum is σ = 42421620. Its totient is φ = 42421618.

The previous prime is 42421559. The next prime is 42421633. The reversal of 42421619 is 91612424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42421619 - 2⁸ = 42421363 is a prime.

It is a super-2 number, since 2×42421619² = 3599187517162322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42421591 and 42421600.

It is not a weakly prime, because it can be changed into another prime (42421219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210809 + 21210810.

It is an arithmetic number, because the mean of its divisors is an integer number (21210810).

Almost surely, 2^42421619 is an apocalyptic number.

42421619 is a deficient number, since it is larger than the sum of its proper divisors (1).

42421619 is an equidigital number, since it uses as much as digits as its factorization.

42421619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 42421619 is about 6513.1880826520. The cubic root of 42421619 is about 348.7619359318.

The spelling of 42421619 in words is "forty-two million, four hundred twenty-one thousand, six hundred nineteen".