42500017 has 16 divisors (see below), whose sum is σ = 54138240. Its totient is φ = 32479488.

The previous prime is 42499999. The next prime is 42500023. The reversal of 42500017 is 71000524.

It is a cyclic number.

It is not a de Polignac number, because 42500017 - 2¹⁹ = 41975729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42499967 and 42500003.

It is not an unprimeable number, because it can be changed into a prime (42500027) 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, 7138 + ... + 11659.

It is an arithmetic number, because the mean of its divisors is an integer number (3383640).

Almost surely, 2^42500017 is an apocalyptic number.

It is an amenable number.

42500017 is a deficient number, since it is larger than the sum of its proper divisors (11638223).

42500017 is a wasteful number, since it uses less digits than its factorization.

42500017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18840.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 42500017 is about 6519.2037090430. The cubic root of 42500017 is about 348.9766488757.

The spelling of 42500017 in words is "forty-two million, five hundred thousand, seventeen".