42456619 has 2 divisors, whose sum is σ = 42456620. Its totient is φ = 42456618.

The previous prime is 42456611. The next prime is 42456629. The reversal of 42456619 is 91665424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42456619 - 2³ = 42456611 is a prime.

It is a super-2 number, since 2×42456619² = 3605128993822322, which contains 22 as substring.

It is equal to p_2573686 and since 42456619 and 2573686 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42456611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21228309 + 21228310.

It is an arithmetic number, because the mean of its divisors is an integer number (21228310).

Almost surely, 2^42456619 is an apocalyptic number.

42456619 is a deficient number, since it is larger than the sum of its proper divisors (1).

42456619 is an equidigital number, since it uses as much as digits as its factorization.

42456619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 42456619 is about 6515.8743849157. The cubic root of 42456619 is about 348.8578250291.

The spelling of 42456619 in words is "forty-two million, four hundred fifty-six thousand, six hundred nineteen".