8251487 has 4 divisors (see below), whose sum is σ = 8517696. Its totient is φ = 7985280.

The previous prime is 8251483. The next prime is 8251489. The reversal of 8251487 is 7841528.

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

It is a cyclic number.

It is not a de Polignac number, because 8251487 - 2² = 8251483 is a prime.

It is a super-2 number, since 2×8251487² = 136174075422338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8251483) 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, 133058 + ... + 133119.

It is an arithmetic number, because the mean of its divisors is an integer number (2129424).

Almost surely, 2^8251487 is an apocalyptic number.

8251487 is a deficient number, since it is larger than the sum of its proper divisors (266209).

8251487 is a wasteful number, since it uses less digits than its factorization.

8251487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266208.

The product of its digits is 17920, while the sum is 35.

The square root of 8251487 is about 2872.5401650804. The cubic root of 8251487 is about 202.0741403501.

The spelling of 8251487 in words is "eight million, two hundred fifty-one thousand, four hundred eighty-seven".