42417919 has 2 divisors, whose sum is σ = 42417920. Its totient is φ = 42417918.

The previous prime is 42417887. The next prime is 42417929. The reversal of 42417919 is 91971424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42417919 - 2⁵ = 42417887 is a prime.

It is a super-2 number, since 2×42417919² = 3598559704581122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42417929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21208959 + 21208960.

It is an arithmetic number, because the mean of its divisors is an integer number (21208960).

Almost surely, 2^42417919 is an apocalyptic number.

42417919 is a deficient number, since it is larger than the sum of its proper divisors (1).

42417919 is an equidigital number, since it uses as much as digits as its factorization.

42417919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 42417919 is about 6512.9040373707. The cubic root of 42417919 is about 348.7517960023.

The spelling of 42417919 in words is "forty-two million, four hundred seventeen thousand, nine hundred nineteen".