42627509 has 4 divisors (see below), whose sum is σ = 42669120. Its totient is φ = 42585900.

The previous prime is 42627493. The next prime is 42627521. The reversal of 42627509 is 90572624.

42627509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42627509 - 2⁴ = 42627493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42627539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19229 + ... + 21330.

It is an arithmetic number, because the mean of its divisors is an integer number (10667280).

Almost surely, 2^42627509 is an apocalyptic number.

It is an amenable number.

42627509 is a deficient number, since it is larger than the sum of its proper divisors (41611).

42627509 is a wasteful number, since it uses less digits than its factorization.

42627509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41610.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 42627509 is about 6528.9745749237. The cubic root of 42627509 is about 349.3252551362.

The spelling of 42627509 in words is "forty-two million, six hundred twenty-seven thousand, five hundred nine".