87247 has 4 divisors (see below), whose sum is σ = 89320. Its totient is φ = 85176.

The previous prime is 87223. The next prime is 87251. The reversal of 87247 is 74278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74278 = 2 ⋅37139.

It is a cyclic number.

It is not a de Polignac number, because 87247 - 2⁷ = 87119 is a prime.

It is a super-2 number, since 2×87247² = 15224078018, 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 (87257) 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, 972 + ... + 1057.

It is an arithmetic number, because the mean of its divisors is an integer number (22330).

2⁸⁷²⁴⁷ is an apocalyptic number.

87247 is a deficient number, since it is larger than the sum of its proper divisors (2073).

87247 is a wasteful number, since it uses less digits than its factorization.

87247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072.

The product of its digits is 3136, while the sum is 28.

The square root of 87247 is about 295.3760315259. The cubic root of 87247 is about 44.3523702641.

It can be divided in two parts, 872 and 47, that added together give a palindrome (919).

The spelling of 87247 in words is "eighty-seven thousand, two hundred forty-seven".