42256217 has 8 divisors (see below), whose sum is σ = 42653952. Its totient is φ = 41860800.

The previous prime is 42256189. The next prime is 42256241. The reversal of 42256217 is 71265224.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42256217 - 2⁶ = 42256153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42256217.

It is not an unprimeable number, because it can be changed into a prime (42216217) 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, 64988 + ... + 65634.

It is an arithmetic number, because the mean of its divisors is an integer number (5331744).

Almost surely, 2^42256217 is an apocalyptic number.

It is an amenable number.

42256217 is a deficient number, since it is larger than the sum of its proper divisors (397735).

42256217 is a wasteful number, since it uses less digits than its factorization.

42256217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its digits is 6720, while the sum is 29.

The square root of 42256217 is about 6500.4782131779. The cubic root of 42256217 is about 348.3080709888.

The spelling of 42256217 in words is "forty-two million, two hundred fifty-six thousand, two hundred seventeen".