42505030 has 24 divisors (see below), whose sum is σ = 79074576. Its totient is φ = 16449840.

The previous prime is 42505013. The next prime is 42505031. The reversal of 42505030 is 3050524.

It is a happy number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 42504989 and 42505007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42505031) 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, 7399 + ... + 11821.

It is an arithmetic number, because the mean of its divisors is an integer number (3294774).

Almost surely, 2^42505030 is an apocalyptic number.

42505030 is a deficient number, since it is larger than the sum of its proper divisors (36569546).

42505030 is a wasteful number, since it uses less digits than its factorization.

42505030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492 (or 4461 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 42505030 is about 6519.5881771781. The cubic root of 42505030 is about 348.9903692714.

Adding to 42505030 its reverse (3050524), we get a palindrome (45555554).

The spelling of 42505030 in words is "forty-two million, five hundred five thousand, thirty".