42394917 has 8 divisors (see below), whose sum is σ = 57109696. Its totient is φ = 27971712.

The previous prime is 42394907. The next prime is 42394927. The reversal of 42394917 is 71949324.

It is an interprime number because it is at equal distance from previous prime (42394907) and next prime (42394927).

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

It is not a de Polignac number, because 42394917 - 2⁷ = 42394789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42394907) 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, 72553 + ... + 73134.

It is an arithmetic number, because the mean of its divisors is an integer number (7138712).

Almost surely, 2^42394917 is an apocalyptic number.

It is an amenable number.

42394917 is a deficient number, since it is larger than the sum of its proper divisors (14714779).

42394917 is a wasteful number, since it uses less digits than its factorization.

42394917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145787.

The product of its digits is 54432, while the sum is 39.

The square root of 42394917 is about 6511.1379189816. The cubic root of 42394917 is about 348.6887452958.

The spelling of 42394917 in words is "forty-two million, three hundred ninety-four thousand, nine hundred seventeen".