42274021 has 8 divisors (see below), whose sum is σ = 42903000. Its totient is φ = 41648640.

The previous prime is 42274013. The next prime is 42274027. The reversal of 42274021 is 12047224.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1185921 + 41088100 = 1089^2 + 6410^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42274021 - 2³ = 42274013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42273983 and 42274001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42274027) 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 7 ways as a sum of consecutive naturals, for example, 30381 + ... + 31741.

It is an arithmetic number, because the mean of its divisors is an integer number (5362875).

Almost surely, 2^42274021 is an apocalyptic number.

It is an amenable number.

42274021 is a deficient number, since it is larger than the sum of its proper divisors (628979).

42274021 is a wasteful number, since it uses less digits than its factorization.

42274021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 42274021 is about 6501.8475066707. The cubic root of 42274021 is about 348.3569821834.

The spelling of 42274021 in words is "forty-two million, two hundred seventy-four thousand, twenty-one".