42190225 has 72 divisors (see below), whose sum is σ = 69209856. Its totient is φ = 25200000.

The previous prime is 42190219. The next prime is 42190231. The reversal of 42190225 is 52209124.

It is an interprime number because it is at equal distance from previous prime (42190219) and next prime (42190231).

It is not a de Polignac number, because 42190225 - 2³ = 42190217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 42190225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 417675 + ... + 417775.

It is an arithmetic number, because the mean of its divisors is an integer number (961248).

Almost surely, 2^42190225 is an apocalyptic number.

It is an amenable number.

42190225 is a deficient number, since it is larger than the sum of its proper divisors (27019631).

42190225 is a wasteful number, since it uses less digits than its factorization.

42190225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 42190225 is about 6495.4002955938. The cubic root of 42190225 is about 348.1266576660.

Adding to 42190225 its reverse (52209124), we get a palindrome (94399349).

The spelling of 42190225 in words is "forty-two million, one hundred ninety thousand, two hundred twenty-five".