42039525 has 24 divisors (see below), whose sum is σ = 75825504. Its totient is φ = 20382400.

The previous prime is 42039523. The next prime is 42039539. The reversal of 42039525 is 52593024.

It is not a de Polignac number, because 42039525 - 2¹ = 42039523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42039492 and 42039501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42039523) 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, 24654 + ... + 26303.

It is an arithmetic number, because the mean of its divisors is an integer number (3159396).

Almost surely, 2^42039525 is an apocalyptic number.

It is an amenable number.

42039525 is a deficient number, since it is larger than the sum of its proper divisors (33785979).

42039525 is a wasteful number, since it uses less digits than its factorization.

42039525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50981 (or 50976 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 42039525 is about 6483.7894012684. The cubic root of 42039525 is about 347.7116699472.

The spelling of 42039525 in words is "forty-two million, thirty-nine thousand, five hundred twenty-five".