42266021 has 8 divisors (see below), whose sum is σ = 49969920. Its totient is φ = 34978608.

The previous prime is 42265999. The next prime is 42266041. The reversal of 42266021 is 12066224.

42266021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42266021 - 2¹⁸ = 42003877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42266041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103901 + ... + 104306.

It is an arithmetic number, because the mean of its divisors is an integer number (6246240).

Almost surely, 2^42266021 is an apocalyptic number.

It is an amenable number.

42266021 is a deficient number, since it is larger than the sum of its proper divisors (7703899).

42266021 is a wasteful number, since it uses less digits than its factorization.

42266021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208243.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 42266021 is about 6501.2322678089. The cubic root of 42266021 is about 348.3350062622.

The spelling of 42266021 in words is "forty-two million, two hundred sixty-six thousand, twenty-one".