87061 has 8 divisors (see below), whose sum is σ = 96824. Its totient is φ = 77760.

The previous prime is 87049. The next prime is 87071. The reversal of 87061 is 16078.

It can be written as a sum of positive squares in 4 ways, for example, as 625 + 86436 = 25^2 + 294^2 .

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

It is a 5-Lehmer number, since φ(87061) divides (87061-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 87061 - 2¹⁵ = 54293 is a prime.

It is an Ulam number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391 + ... + 571.

It is an arithmetic number, because the mean of its divisors is an integer number (12103).

2⁸⁷⁰⁶¹ is an apocalyptic number.

It is an amenable number.

87061 is a deficient number, since it is larger than the sum of its proper divisors (9763).

87061 is a wasteful number, since it uses less digits than its factorization.

87061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 87061 is about 295.0610106402. The cubic root of 87061 is about 44.3208298858.

The spelling of 87061 in words is "eighty-seven thousand, sixty-one".