42001917 has 32 divisors (see below), whose sum is σ = 62052480. Its totient is φ = 25159680.

The previous prime is 42001903. The next prime is 42001957. The reversal of 42001917 is 71910024.

It is not a de Polignac number, because 42001917 - 2⁷ = 42001789 is a prime.

It is a super-2 number, since 2×42001917² = 3528322063349778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42001957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110634 + ... + 111012.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^42001917 is an apocalyptic number.

It is an amenable number.

42001917 is a deficient number, since it is larger than the sum of its proper divisors (20050563).

42001917 is a wasteful number, since it uses less digits than its factorization.

42001917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 42001917 is about 6480.8885964812. Note that the first 3 decimals coincide. The cubic root of 42001917 is about 347.6079529344.

The spelling of 42001917 in words is "forty-two million, one thousand, nine hundred seventeen".