42530786 has 16 divisors (see below), whose sum is σ = 65587320. Its totient is φ = 20676480.

The previous prime is 42530779. The next prime is 42530801. The reversal of 42530786 is 68703524.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25150225 + 17380561 = 5015^2 + 4169^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8900 + ... + 12816.

Almost surely, 2^42530786 is an apocalyptic number.

42530786 is a deficient number, since it is larger than the sum of its proper divisors (23056534).

42530786 is a wasteful number, since it uses less digits than its factorization.

42530786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 42530786 is about 6521.5631561766. The cubic root of 42530786 is about 349.0608454873.

The spelling of 42530786 in words is "forty-two million, five hundred thirty thousand, seven hundred eighty-six".