42855613 has 4 divisors (see below), whose sum is σ = 43280028. Its totient is φ = 42431200.

The previous prime is 42855581. The next prime is 42855661. The reversal of 42855613 is 31655824.

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 37295449 + 5560164 = 6107^2 + 2358^2 .

It is a cyclic number.

It is not a de Polignac number, because 42855613 - 2⁵ = 42855581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42855713) 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, 212056 + ... + 212257.

It is an arithmetic number, because the mean of its divisors is an integer number (10820007).

Almost surely, 2^42855613 is an apocalyptic number.

It is an amenable number.

42855613 is a deficient number, since it is larger than the sum of its proper divisors (424415).

42855613 is a wasteful number, since it uses less digits than its factorization.

42855613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424414.

The product of its digits is 28800, while the sum is 34.

The square root of 42855613 is about 6546.4198612677. The cubic root of 42855613 is about 349.9472383052.

The spelling of 42855613 in words is "forty-two million, eight hundred fifty-five thousand, six hundred thirteen".