42752225 has 12 divisors (see below), whose sum is σ = 53107836. Its totient is φ = 34140480.

The previous prime is 42752173. The next prime is 42752249. The reversal of 42752225 is 52225724.

It can be written as a sum of positive squares in 6 ways, for example, as 398161 + 42354064 = 631^2 + 6508^2 .

It is not a de Polignac number, because 42752225 - 2²⁴ = 25975009 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 17159 + ... + 19491.

It is an arithmetic number, because the mean of its divisors is an integer number (4425653).

Almost surely, 2^42752225 is an apocalyptic number.

It is an amenable number.

42752225 is a deficient number, since it is larger than the sum of its proper divisors (10355611).

42752225 is a wasteful number, since it uses less digits than its factorization.

42752225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076 (or 3071 counting only the distinct ones).

The product of its digits is 11200, while the sum is 29.

The square root of 42752225 is about 6538.5185630997. The cubic root of 42752225 is about 349.6655989718.

Adding to 42752225 its reverse (52225724), we get a palindrome (94977949).

The spelling of 42752225 in words is "forty-two million, seven hundred fifty-two thousand, two hundred twenty-five".