42332021 has 4 divisors (see below), whose sum is σ = 42665472. Its totient is φ = 41998572.

The previous prime is 42332011. The next prime is 42332027. The reversal of 42332021 is 12023324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42332021 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 (42332027) 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, 166535 + ... + 166788.

It is an arithmetic number, because the mean of its divisors is an integer number (10666368).

Almost surely, 2^42332021 is an apocalyptic number.

It is an amenable number.

42332021 is a deficient number, since it is larger than the sum of its proper divisors (333451).

42332021 is a wasteful number, since it uses less digits than its factorization.

42332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333450.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 42332021 is about 6506.3062485561. The cubic root of 42332021 is about 348.5162247571.

Adding to 42332021 its reverse (12023324), we get a palindrome (54355345).

The spelling of 42332021 in words is "forty-two million, three hundred thirty-two thousand, twenty-one".