42242225 has 24 divisors (see below), whose sum is σ = 55695840. Its totient is φ = 31691520.

The previous prime is 42242173. The next prime is 42242251. The reversal of 42242225 is 52224224.

It is not a de Polignac number, because 42242225 - 2¹² = 42238129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42242225.

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, 53282 + ... + 54068.

It is an arithmetic number, because the mean of its divisors is an integer number (2320660).

Almost surely, 2^42242225 is an apocalyptic number.

It is an amenable number.

42242225 is a deficient number, since it is larger than the sum of its proper divisors (13453615).

42242225 is a wasteful number, since it uses less digits than its factorization.

42242225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 924 counting only the distinct ones).

The product of its digits is 2560, while the sum is 23.

The square root of 42242225 is about 6499.4018955593. The cubic root of 42242225 is about 348.2696224883.

Adding to 42242225 its reverse (52224224), we get a palindrome (94466449).

The spelling of 42242225 in words is "forty-two million, two hundred forty-two thousand, two hundred twenty-five".