42259817 has 4 divisors (see below), whose sum is σ = 42290820. Its totient is φ = 42228816.

The previous prime is 42259801. The next prime is 42259823. The reversal of 42259817 is 71895224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4116841 + 38142976 = 2029^2 + 6176^2 .

It is a cyclic number.

It is not a de Polignac number, because 42259817 - 2⁴ = 42259801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42259897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13358 + ... + 16215.

It is an arithmetic number, because the mean of its divisors is an integer number (10572705).

Almost surely, 2^42259817 is an apocalyptic number.

It is an amenable number.

42259817 is a deficient number, since it is larger than the sum of its proper divisors (31003).

42259817 is a wasteful number, since it uses less digits than its factorization.

42259817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31002.

The product of its digits is 40320, while the sum is 38.

The square root of 42259817 is about 6500.7551099853. The cubic root of 42259817 is about 348.3179620261.

The spelling of 42259817 in words is "forty-two million, two hundred fifty-nine thousand, eight hundred seventeen".