42023217 has 16 divisors (see below), whose sum is σ = 57434112. Its totient is φ = 27318480.

The previous prime is 42023207. The next prime is 42023221. The reversal of 42023217 is 71232024.

It is not a de Polignac number, because 42023217 - 2⁷ = 42023089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42023193 and 42023202.

It is not an unprimeable number, because it can be changed into a prime (42023207) 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, 68928 + ... + 69534.

It is an arithmetic number, because the mean of its divisors is an integer number (3589632).

Almost surely, 2^42023217 is an apocalyptic number.

42023217 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

42023217 is a deficient number, since it is larger than the sum of its proper divisors (15410895).

42023217 is a wasteful number, since it uses less digits than its factorization.

42023217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 42023217 is about 6482.5316813726. The cubic root of 42023217 is about 347.6667026194. Note that the first 3 decimals are identical.

The spelling of 42023217 in words is "forty-two million, twenty-three thousand, two hundred seventeen".