42097817 has 8 divisors (see below), whose sum is σ = 43686720. Its totient is φ = 40536720.

The previous prime is 42097813. The next prime is 42097819. The reversal of 42097817 is 71879024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42097817 - 2² = 42097813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42097813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3842 + ... + 9947.

It is an arithmetic number, because the mean of its divisors is an integer number (5460840).

Almost surely, 2^42097817 is an apocalyptic number.

It is an amenable number.

42097817 is a deficient number, since it is larger than the sum of its proper divisors (1588903).

42097817 is a wasteful number, since it uses less digits than its factorization.

42097817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13903.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 42097817 is about 6488.2830548613. The cubic root of 42097817 is about 347.8723080422.

The spelling of 42097817 in words is "forty-two million, ninety-seven thousand, eight hundred seventeen".