42305287 has 8 divisors (see below), whose sum is σ = 43892640. Its totient is φ = 40726560.

The previous prime is 42305261. The next prime is 42305323. The reversal of 42305287 is 78250324.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42305287 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 (42305227) 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 7 ways as a sum of consecutive naturals, for example, 8862 + ... + 12772.

It is an arithmetic number, because the mean of its divisors is an integer number (5486580).

Almost surely, 2^42305287 is an apocalyptic number.

42305287 is a deficient number, since it is larger than the sum of its proper divisors (1587353).

42305287 is a wasteful number, since it uses less digits than its factorization.

42305287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 42305287 is about 6504.2514557788. The cubic root of 42305287 is about 348.4428429955.

The spelling of 42305287 in words is "forty-two million, three hundred five thousand, two hundred eighty-seven".