42510730 has 8 divisors (see below), whose sum is σ = 76519332. Its totient is φ = 17004288.

The previous prime is 42510719. The next prime is 42510737. The reversal of 42510730 is 3701524.

It can be written as a sum of positive squares in 2 ways, for example, as 40233649 + 2277081 = 6343^2 + 1509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42510737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125527 + ... + 2125546.

Almost surely, 2^42510730 is an apocalyptic number.

42510730 is a deficient number, since it is larger than the sum of its proper divisors (34008602).

42510730 is a wasteful number, since it uses less digits than its factorization.

42510730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251080.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 42510730 is about 6520.0253066994. The cubic root of 42510730 is about 349.0059686502.

The spelling of 42510730 in words is "forty-two million, five hundred ten thousand, seven hundred thirty".