7871087 has 4 divisors (see below), whose sum is σ = 8995536. Its totient is φ = 6746640.

The previous prime is 7871081. The next prime is 7871113. The reversal of 7871087 is 7801787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7801787 = 7 ⋅1114541.

It is a cyclic number.

It is not a de Polignac number, because 7871087 - 2¹⁴ = 7854703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7871087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7871081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562214 + ... + 562227.

It is an arithmetic number, because the mean of its divisors is an integer number (2248884).

Almost surely, 2^7871087 is an apocalyptic number.

7871087 is a deficient number, since it is larger than the sum of its proper divisors (1124449).

7871087 is a wasteful number, since it uses less digits than its factorization.

7871087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124448.

The product of its (nonzero) digits is 21952, while the sum is 38.

The square root of 7871087 is about 2805.5457579587. The cubic root of 7871087 is about 198.9199024468.

The spelling of 7871087 in words is "seven million, eight hundred seventy-one thousand, eighty-seven".