42205917 has 16 divisors (see below), whose sum is σ = 64169280. Its totient is φ = 24444672.

The previous prime is 42205907. The next prime is 42205921. The reversal of 42205917 is 71950224.

It is not a de Polignac number, because 42205917 - 2¹⁰ = 42204893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42205907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31167 + ... + 32492.

It is an arithmetic number, because the mean of its divisors is an integer number (4010580).

Almost surely, 2^42205917 is an apocalyptic number.

It is an amenable number.

42205917 is a deficient number, since it is larger than the sum of its proper divisors (21963363).

42205917 is a wasteful number, since it uses less digits than its factorization.

42205917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63692.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 42205917 is about 6496.6081150089. The cubic root of 42205917 is about 348.1698124203.

The spelling of 42205917 in words is "forty-two million, two hundred five thousand, nine hundred seventeen".