42807025 has 24 divisors (see below), whose sum is σ = 55978560. Its totient is φ = 32408640.

The previous prime is 42806983. The next prime is 42807029. The reversal of 42807025 is 52070824.

It is a de Polignac number, because none of the positive numbers 2^k-42807025 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42806984 and 42807002.

It is not an unprimeable number, because it can be changed into a prime (42807029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62334 + ... + 63016.

It is an arithmetic number, because the mean of its divisors is an integer number (2332440).

Almost surely, 2^42807025 is an apocalyptic number.

It is an amenable number.

42807025 is a deficient number, since it is larger than the sum of its proper divisors (13171535).

42807025 is a wasteful number, since it uses less digits than its factorization.

42807025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 42807025 is about 6542.7077727803. The cubic root of 42807025 is about 349.8149361777.

Adding to 42807025 its reverse (52070824), we get a palindrome (94877849).

The spelling of 42807025 in words is "forty-two million, eight hundred seven thousand, twenty-five".