42997225 has 12 divisors (see below), whose sum is σ = 53461980. Its totient is φ = 34304000.

The previous prime is 42997223. The next prime is 42997243. The reversal of 42997225 is 52279924.

It can be written as a sum of positive squares in 6 ways, for example, as 8856576 + 34140649 = 2976^2 + 5843^2 .

It is not a de Polignac number, because 42997225 - 2¹ = 42997223 is a prime.

It is a super-2 number, since 2×42997225² = 3697522715401250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42997223) by changing a digit.

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, 7881 + ... + 12169.

It is an arithmetic number, because the mean of its divisors is an integer number (4455165).

Almost surely, 2^42997225 is an apocalyptic number.

It is an amenable number.

42997225 is a deficient number, since it is larger than the sum of its proper divisors (10464755).

42997225 is a wasteful number, since it uses less digits than its factorization.

42997225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700 (or 4695 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 42997225 is about 6557.2269291218. The cubic root of 42997225 is about 350.3322694970.

The spelling of 42997225 in words is "forty-two million, nine hundred ninety-seven thousand, two hundred twenty-five".