42422861 has 4 divisors (see below), whose sum is σ = 45686172. Its totient is φ = 39159552.

The previous prime is 42422857. The next prime is 42422881. The reversal of 42422861 is 16822424.

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 25694761 + 16728100 = 5069^2 + 4090^2 .

It is a cyclic number.

It is not a de Polignac number, because 42422861 - 2² = 42422857 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 (42422881) 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, 1631636 + ... + 1631661.

It is an arithmetic number, because the mean of its divisors is an integer number (11421543).

Almost surely, 2^42422861 is an apocalyptic number.

It is an amenable number.

42422861 is a deficient number, since it is larger than the sum of its proper divisors (3263311).

42422861 is a wasteful number, since it uses less digits than its factorization.

42422861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263310.

The product of its digits is 6144, while the sum is 29.

The square root of 42422861 is about 6513.2834269668. The cubic root of 42422861 is about 348.7653395273.

The spelling of 42422861 in words is "forty-two million, four hundred twenty-two thousand, eight hundred sixty-one".