42065025 has 24 divisors (see below), whose sum is σ = 69754464. Its totient is φ = 22368000.

The previous prime is 42065011. The next prime is 42065027. The reversal of 42065025 is 52056024.

It is not a de Polignac number, because 42065025 - 2⁹ = 42064513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42064986 and 42065004.

It is not an unprimeable number, because it can be changed into a prime (42065027) 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, 34425 + ... + 35625.

It is an arithmetic number, because the mean of its divisors is an integer number (2906436).

Almost surely, 2^42065025 is an apocalyptic number.

It is an amenable number.

42065025 is a deficient number, since it is larger than the sum of its proper divisors (27689439).

42065025 is a wasteful number, since it uses less digits than its factorization.

42065025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1676 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42065025 is about 6485.7555458096. The cubic root of 42065025 is about 347.7819597949.

Subtracting 42065025 from its reverse (52056024), we obtain a palindrome (9990999).

The spelling of 42065025 in words is "forty-two million, sixty-five thousand, twenty-five".