42530425 has 12 divisors (see below), whose sum is σ = 60271936. Its totient is φ = 29163600.

The previous prime is 42530387. The next prime is 42530429. The reversal of 42530425 is 52403524.

It is not a de Polignac number, because 42530425 - 2⁷ = 42530297 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42530425.

It is not an unprimeable number, because it can be changed into a prime (42530429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121341 + ... + 121690.

Almost surely, 2^42530425 is an apocalyptic number.

It is an amenable number.

42530425 is a deficient number, since it is larger than the sum of its proper divisors (17741511).

42530425 is a wasteful number, since it uses less digits than its factorization.

42530425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243048 (or 243043 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 42530425 is about 6521.5354787044. The cubic root of 42530425 is about 349.0598578786.

Adding to 42530425 its reverse (52403524), we get a palindrome (94933949).

The spelling of 42530425 in words is "forty-two million, five hundred thirty thousand, four hundred twenty-five".