42842057 has 4 divisors (see below), whose sum is σ = 45362196. Its totient is φ = 40321920.

The previous prime is 42841993. The next prime is 42842071. The reversal of 42842057 is 75024824.

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 17480761 + 25361296 = 4181^2 + 5036^2 .

It is a cyclic number.

It is not a de Polignac number, because 42842057 - 2⁶ = 42841993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42842257) 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, 1260044 + ... + 1260077.

It is an arithmetic number, because the mean of its divisors is an integer number (11340549).

Almost surely, 2^42842057 is an apocalyptic number.

It is an amenable number.

42842057 is a deficient number, since it is larger than the sum of its proper divisors (2520139).

42842057 is a wasteful number, since it uses less digits than its factorization.

42842057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520138.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 42842057 is about 6545.3844042959. The cubic root of 42842057 is about 349.9103362154.

It can be divided in two parts, 4284 and 2057, that multiplied together give a palindrome (8812188).

The spelling of 42842057 in words is "forty-two million, eight hundred forty-two thousand, fifty-seven".