42570257 has 4 divisors (see below), whose sum is σ = 42671796. Its totient is φ = 42468720.

The previous prime is 42570233. The next prime is 42570287. The reversal of 42570257 is 75207524.

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 5494336 + 37075921 = 2344^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 42570257 - 2¹⁸ = 42308113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42570287) 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, 50138 + ... + 50979.

It is an arithmetic number, because the mean of its divisors is an integer number (10667949).

Almost surely, 2^42570257 is an apocalyptic number.

It is an amenable number.

42570257 is a deficient number, since it is larger than the sum of its proper divisors (101539).

42570257 is a wasteful number, since it uses less digits than its factorization.

42570257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101538.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 42570257 is about 6524.5886460374. The cubic root of 42570257 is about 349.1687949041.

The spelling of 42570257 in words is "forty-two million, five hundred seventy thousand, two hundred fifty-seven".