40042225 has 24 divisors (see below), whose sum is σ = 53353728. Its totient is φ = 29702400.

The previous prime is 40042213. The next prime is 40042229. The reversal of 40042225 is 52224004.

It is not a de Polignac number, because 40042225 - 2⁹ = 40041713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40042229) 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, 29512 + ... + 30838.

It is an arithmetic number, because the mean of its divisors is an integer number (2223072).

Almost surely, 2^40042225 is an apocalyptic number.

It is an amenable number.

40042225 is a deficient number, since it is larger than the sum of its proper divisors (13311503).

40042225 is a wasteful number, since it uses less digits than its factorization.

40042225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1420 counting only the distinct ones).

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

The square root of 40042225 is about 6327.8926191901. The cubic root of 40042225 is about 342.1154865729.

Adding to 40042225 its reverse (52224004), we get a palindrome (92266229).

The spelling of 40042225 in words is "forty million, forty-two thousand, two hundred twenty-five".