42497919 has 8 divisors (see below), whose sum is σ = 62959920. Its totient is φ = 28331928.

The previous prime is 42497911. The next prime is 42497947. The reversal of 42497919 is 91979424.

It is a happy number.

It is not a de Polignac number, because 42497919 - 2³ = 42497911 is a prime.

It is a super-2 number, since 2×42497919² = 3612146238661122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42497911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786972 + ... + 787025.

It is an arithmetic number, because the mean of its divisors is an integer number (7869990).

Almost surely, 2^42497919 is an apocalyptic number.

42497919 is a deficient number, since it is larger than the sum of its proper divisors (20462001).

42497919 is a wasteful number, since it uses less digits than its factorization.

42497919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574006 (or 1574000 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 42497919 is about 6519.0427978347. The cubic root of 42497919 is about 348.9709064069.

The spelling of 42497919 in words is "forty-two million, four hundred ninety-seven thousand, nine hundred nineteen".