42500287 has 4 divisors (see below), whose sum is σ = 43871296. Its totient is φ = 41129280.

The previous prime is 42500281. The next prime is 42500303. The reversal of 42500287 is 78200524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42500287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42500281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685458 + ... + 685519.

It is an arithmetic number, because the mean of its divisors is an integer number (10967824).

Almost surely, 2^42500287 is an apocalyptic number.

42500287 is a deficient number, since it is larger than the sum of its proper divisors (1371009).

42500287 is a wasteful number, since it uses less digits than its factorization.

42500287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371008.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 42500287 is about 6519.2244170607. The cubic root of 42500287 is about 348.9773878832.

The spelling of 42500287 in words is "forty-two million, five hundred thousand, two hundred eighty-seven".