8251987 has 4 divisors (see below), whose sum is σ = 8737416. Its totient is φ = 7766560.

The previous prime is 8251951. The next prime is 8252017. The reversal of 8251987 is 7891528.

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-8251987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8251907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242689 + ... + 242722.

It is an arithmetic number, because the mean of its divisors is an integer number (2184354).

Almost surely, 2^8251987 is an apocalyptic number.

8251987 is a deficient number, since it is larger than the sum of its proper divisors (485429).

8251987 is a wasteful number, since it uses less digits than its factorization.

8251987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485428.

The product of its digits is 40320, while the sum is 40.

The square root of 8251987 is about 2872.6271947470. The cubic root of 8251987 is about 202.0782218379.

The spelling of 8251987 in words is "eight million, two hundred fifty-one thousand, nine hundred eighty-seven".