42577217 has 4 divisors (see below), whose sum is σ = 42687060. Its totient is φ = 42467376.

The previous prime is 42577211. The next prime is 42577219. The reversal of 42577217 is 71277524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9388096 + 33189121 = 3064^2 + 5761^2 .

It is a cyclic number.

It is not a de Polignac number, because 42577217 - 2¹⁸ = 42315073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42577211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54338 + ... + 55115.

It is an arithmetic number, because the mean of its divisors is an integer number (10671765).

Almost surely, 2^42577217 is an apocalyptic number.

It is an amenable number.

42577217 is a deficient number, since it is larger than the sum of its proper divisors (109843).

42577217 is a wasteful number, since it uses less digits than its factorization.

42577217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109842.

The product of its digits is 27440, while the sum is 35.

The square root of 42577217 is about 6525.1219911968. The cubic root of 42577217 is about 349.1878229185.

The spelling of 42577217 in words is "forty-two million, five hundred seventy-seven thousand, two hundred seventeen".