8487861 has 16 divisors (see below), whose sum is σ = 11695488. Its totient is φ = 5472000.

The previous prime is 8487859. The next prime is 8487863. The reversal of 8487861 is 1687848.

It is an interprime number because it is at equal distance from previous prime (8487859) and next prime (8487863).

It is not a de Polignac number, because 8487861 - 2¹ = 8487859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8487863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18345 + ... + 18801.

It is an arithmetic number, because the mean of its divisors is an integer number (730968).

Almost surely, 2^8487861 is an apocalyptic number.

It is an amenable number.

8487861 is a deficient number, since it is larger than the sum of its proper divisors (3207627).

8487861 is a wasteful number, since it uses less digits than its factorization.

8487861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 86016, while the sum is 42.

The square root of 8487861 is about 2913.3933822949. The cubic root of 8487861 is about 203.9855574166.

The spelling of 8487861 in words is "eight million, four hundred eighty-seven thousand, eight hundred sixty-one".