87501 has 4 divisors (see below), whose sum is σ = 116672. Its totient is φ = 58332.

The previous prime is 87491. The next prime is 87509. The reversal of 87501 is 10578.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87501 - 2¹⁰ = 86477 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87509) 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, 14581 + ... + 14586.

It is an arithmetic number, because the mean of its divisors is an integer number (29168).

2⁸⁷⁵⁰¹ is an apocalyptic number.

It is an amenable number.

87501 is a deficient number, since it is larger than the sum of its proper divisors (29171).

87501 is a wasteful number, since it uses less digits than its factorization.

87501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29170.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 87501 is about 295.8056794587. The cubic root of 87501 is about 44.3953692111.

The spelling of 87501 in words is "eighty-seven thousand, five hundred one".