42501225 has 24 divisors (see below), whose sum is σ = 75675712. Its totient is φ = 20923200.

The previous prime is 42501209. The next prime is 42501253. The reversal of 42501225 is 52210524.

It is a happy number.

It is not a de Polignac number, because 42501225 - 2⁴ = 42501209 is a prime.

It is a Duffinian 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, 20821 + ... + 22770.

Almost surely, 2^42501225 is an apocalyptic number.

It is an amenable number.

42501225 is a deficient number, since it is larger than the sum of its proper divisors (33174487).

42501225 is a wasteful number, since it uses less digits than its factorization.

42501225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43617 (or 43612 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42501225 is about 6519.2963577368. The cubic root of 42501225 is about 348.9799552257.

Adding to 42501225 its reverse (52210524), we get a palindrome (94711749).

The spelling of 42501225 in words is "forty-two million, five hundred one thousand, two hundred twenty-five".