87145 has 8 divisors (see below), whose sum is σ = 108360. Its totient is φ = 67200.

The previous prime is 87133. The next prime is 87149. The reversal of 87145 is 54178.

It can be written as a sum of positive squares in 4 ways, for example, as 21609 + 65536 = 147^2 + 256^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87145 - 2¹⁵ = 54377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 445.

It is an arithmetic number, because the mean of its divisors is an integer number (13545).

2⁸⁷¹⁴⁵ is an apocalyptic number.

It is an amenable number.

87145 is a deficient number, since it is larger than the sum of its proper divisors (21215).

87145 is a wasteful number, since it uses less digits than its factorization.

87145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635.

The product of its digits is 1120, while the sum is 25.

The square root of 87145 is about 295.2033197645. The cubic root of 87145 is about 44.3350794847.

It can be divided in two parts, 87 and 145, that added together give a palindrome (232).

The spelling of 87145 in words is "eighty-seven thousand, one hundred forty-five".