42902857 has 4 divisors (see below), whose sum is σ = 43120836. Its totient is φ = 42684880.

The previous prime is 42902837. The next prime is 42902887. The reversal of 42902857 is 75820924.

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 42237001 + 665856 = 6499^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 42902857 - 2¹⁵ = 42870089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42902807) 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, 108694 + ... + 109087.

It is an arithmetic number, because the mean of its divisors is an integer number (10780209).

Almost surely, 2^42902857 is an apocalyptic number.

It is an amenable number.

42902857 is a deficient number, since it is larger than the sum of its proper divisors (217979).

42902857 is a wasteful number, since it uses less digits than its factorization.

42902857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217978.

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

The square root of 42902857 is about 6550.0272518517. The cubic root of 42902857 is about 350.0757849498.

The spelling of 42902857 in words is "forty-two million, nine hundred two thousand, eight hundred fifty-seven".