442345025 has 6 divisors (see below), whose sum is σ = 548507862. Its totient is φ = 353876000.

The previous prime is 442345021. The next prime is 442345063. The reversal of 442345025 is 520543244.

It is a Cunningham number, because it is equal to 21032²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 442345024 = 1^2 + 21032^2 .

It is not a de Polignac number, because 442345025 - 2² = 442345021 is a prime.

It is a super-2 number, since 2×442345025² = 391338242284501250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442345021) 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, 8846876 + ... + 8846925.

It is an arithmetic number, because the mean of its divisors is an integer number (91417977).

Almost surely, 2^442345025 is an apocalyptic number.

It is an amenable number.

442345025 is a deficient number, since it is larger than the sum of its proper divisors (106162837).

442345025 is a wasteful number, since it uses less digits than its factorization.

442345025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17693811 (or 17693806 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 442345025 is about 21032.0000237733. Note that the first 4 decimals coincide. The cubic root of 442345025 is about 761.9393136938.

Adding to 442345025 its reverse (520543244), we get a palindrome (962888269).

The spelling of 442345025 in words is "four hundred forty-two million, three hundred forty-five thousand, twenty-five".