42507530 has 32 divisors (see below), whose sum is σ = 83462400. Its totient is φ = 15492672.

The previous prime is 42507523. The next prime is 42507551. The reversal of 42507530 is 3570524.

It is a super-3 number, since 3×42507530³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 42507530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8201 + ... + 12339.

It is an arithmetic number, because the mean of its divisors is an integer number (2608200).

Almost surely, 2^42507530 is an apocalyptic number.

42507530 is a deficient number, since it is larger than the sum of its proper divisors (40954870).

42507530 is a wasteful number, since it uses less digits than its factorization.

42507530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 42507530 is about 6519.7799042606. The cubic root of 42507530 is about 348.9972112759.

The spelling of 42507530 in words is "forty-two million, five hundred seven thousand, five hundred thirty".