42004225 has 24 divisors (see below), whose sum is σ = 54496512. Its totient is φ = 32078400.

The previous prime is 42004219. The next prime is 42004301. The reversal of 42004225 is 52240024.

It is not a de Polignac number, because 42004225 - 2¹³ = 41996033 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63999 + ... + 64651.

It is an arithmetic number, because the mean of its divisors is an integer number (2270688).

Almost surely, 2^42004225 is an apocalyptic number.

It is an amenable number.

42004225 is a deficient number, since it is larger than the sum of its proper divisors (12492287).

42004225 is a wasteful number, since it uses less digits than its factorization.

42004225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42004225 is about 6481.0666560374. The cubic root of 42004225 is about 347.6143198221.

Adding to 42004225 its reverse (52240024), we get a palindrome (94244249).

The spelling of 42004225 in words is "forty-two million, four thousand, two hundred twenty-five".