42870529 has 4 divisors (see below), whose sum is σ = 46168276. Its totient is φ = 39572784.

The previous prime is 42870493. The next prime is 42870547. The reversal of 42870529 is 92507824.

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 17640000 + 25230529 = 4200^2 + 5023^2 .

It is a cyclic number.

It is not a de Polignac number, because 42870529 - 2¹⁷ = 42739457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42870629) 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, 1648854 + ... + 1648879.

It is an arithmetic number, because the mean of its divisors is an integer number (11542069).

Almost surely, 2^42870529 is an apocalyptic number.

It is an amenable number.

42870529 is a deficient number, since it is larger than the sum of its proper divisors (3297747).

42870529 is a wasteful number, since it uses less digits than its factorization.

42870529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297746.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 42870529 is about 6547.5590108070. The cubic root of 42870529 is about 349.9878335907.

The spelling of 42870529 in words is "forty-two million, eight hundred seventy thousand, five hundred twenty-nine".