42023242 has 4 divisors (see below), whose sum is σ = 63034866. Its totient is φ = 21011620.

The previous prime is 42023239. The next prime is 42023249. The reversal of 42023242 is 24232024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42003361 + 19881 = 6481^2 + 141^2 .

It is not an unprimeable number, because it can be changed into a prime (42023249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505809 + ... + 10505812.

Almost surely, 2^42023242 is an apocalyptic number.

42023242 is a deficient number, since it is larger than the sum of its proper divisors (21011624).

42023242 is a wasteful number, since it uses less digits than its factorization.

42023242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21011623.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 42023242 is about 6482.5336096313. The cubic root of 42023242 is about 347.6667715627. Note that the first 3 decimals are identical.

Adding to 42023242 its reverse (24232024), we get a palindrome (66255266).

The spelling of 42023242 in words is "forty-two million, twenty-three thousand, two hundred forty-two".