42507187 has 4 divisors (see below), whose sum is σ = 42614656. Its totient is φ = 42399720.

The previous prime is 42507181. The next prime is 42507193. The reversal of 42507187 is 78170524.

It is a happy number.

42507187 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.

It is an interprime number because it is at equal distance from previous prime (42507181) and next prime (42507193).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42507187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42507181) 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, 53139 + ... + 53932.

It is an arithmetic number, because the mean of its divisors is an integer number (10653664).

Almost surely, 2^42507187 is an apocalyptic number.

42507187 is a deficient number, since it is larger than the sum of its proper divisors (107469).

42507187 is a wasteful number, since it uses less digits than its factorization.

42507187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107468.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 42507187 is about 6519.7535996386. The cubic root of 42507187 is about 348.9962725688.

The spelling of 42507187 in words is "forty-two million, five hundred seven thousand, one hundred eighty-seven".