8261287 has 4 divisors (see below), whose sum is σ = 8267056. Its totient is φ = 8255520.

The previous prime is 8261263. The next prime is 8261293. The reversal of 8261287 is 7821628.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8261287 is a prime.

It is an Ulam number.

It is a Duffinian number.

8261287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8231287) 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, 1087 + ... + 4207.

It is an arithmetic number, because the mean of its divisors is an integer number (2066764).

Almost surely, 2^8261287 is an apocalyptic number.

8261287 is a deficient number, since it is larger than the sum of its proper divisors (5769).

8261287 is a wasteful number, since it uses less digits than its factorization.

8261287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768.

The product of its digits is 10752, while the sum is 34.

The square root of 8261287 is about 2874.2454662050. The cubic root of 8261287 is about 202.1541074762.

The spelling of 8261287 in words is "eight million, two hundred sixty-one thousand, two hundred eighty-seven".