42550873 has 4 divisors (see below), whose sum is σ = 42634980. Its totient is φ = 42466768.

The previous prime is 42550831. The next prime is 42550877. The reversal of 42550873 is 37805524.

It is a happy number.

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 29030544 + 13520329 = 5388^2 + 3677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42550873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42550877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41290 + ... + 42307.

It is an arithmetic number, because the mean of its divisors is an integer number (10658745).

Almost surely, 2^42550873 is an apocalyptic number.

It is an amenable number.

42550873 is a deficient number, since it is larger than the sum of its proper divisors (84107).

42550873 is an equidigital number, since it uses as much as digits as its factorization.

42550873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84106.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 42550873 is about 6523.1030192693. The cubic root of 42550873 is about 349.1157898567.

The spelling of 42550873 in words is "forty-two million, five hundred fifty thousand, eight hundred seventy-three".