42528217 has 4 divisors (see below), whose sum is σ = 42647040. Its totient is φ = 42409396.

The previous prime is 42528197. The next prime is 42528221. The reversal of 42528217 is 71282524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42528217 - 2⁷ = 42528089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42520217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58873 + ... + 59590.

It is an arithmetic number, because the mean of its divisors is an integer number (10661760).

Almost surely, 2^42528217 is an apocalyptic number.

It is an amenable number.

42528217 is a deficient number, since it is larger than the sum of its proper divisors (118823).

42528217 is a wasteful number, since it uses less digits than its factorization.

42528217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118822.

The product of its digits is 8960, while the sum is 31.

The square root of 42528217 is about 6521.3661912210. The cubic root of 42528217 is about 349.0538172030.

The spelling of 42528217 in words is "forty-two million, five hundred twenty-eight thousand, two hundred seventeen".