42545225 has 6 divisors (see below), whose sum is σ = 52756110. Its totient is φ = 34036160.

The previous prime is 42545221. The next prime is 42545287. The reversal of 42545225 is 52254524.

It can be written as a sum of positive squares in 3 ways, for example, as 11095561 + 31449664 = 3331^2 + 5608^2 .

It is not a de Polignac number, because 42545225 - 2² = 42545221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42545221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 850880 + ... + 850929.

It is an arithmetic number, because the mean of its divisors is an integer number (8792685).

Almost surely, 2^42545225 is an apocalyptic number.

It is an amenable number.

42545225 is a deficient number, since it is larger than the sum of its proper divisors (10210885).

42545225 is a wasteful number, since it uses less digits than its factorization.

42545225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701819 (or 1701814 counting only the distinct ones).

The product of its digits is 16000, while the sum is 29.

The square root of 42545225 is about 6522.6700821059. The cubic root of 42545225 is about 349.1003425181.

Adding to 42545225 its reverse (52254524), we get a palindrome (94799749).

The spelling of 42545225 in words is "forty-two million, five hundred forty-five thousand, two hundred twenty-five".