42042225 has 24 divisors (see below), whose sum is σ = 70238560. Its totient is φ = 22187520.

The previous prime is 42042211. The next prime is 42042227. The reversal of 42042225 is 52224024.

It is not a de Polignac number, because 42042225 - 2²² = 37847921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42042227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4386 + ... + 10164.

Almost surely, 2^42042225 is an apocalyptic number.

It is an amenable number.

42042225 is a deficient number, since it is larger than the sum of its proper divisors (28196335).

42042225 is a wasteful number, since it uses less digits than its factorization.

42042225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5889 (or 5884 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42042225 is about 6483.9976094999. The cubic root of 42042225 is about 347.7191137469.

Adding to 42042225 its reverse (52224024), we get a palindrome (94266249).

The spelling of 42042225 in words is "forty-two million, forty-two thousand, two hundred twenty-five".