887521 has 4 divisors (see below), whose sum is σ = 893332. Its totient is φ = 881712.

The previous prime is 887503. The next prime is 887533. The reversal of 887521 is 125788.

887521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 483025 + 404496 = 695^2 + 636^2 .

It is not a de Polignac number, because 887521 - 2¹¹ = 885473 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (887581) 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, 2670 + ... + 2983.

It is an arithmetic number, because the mean of its divisors is an integer number (223333).

2⁸⁸⁷⁵²¹ is an apocalyptic number.

It is an amenable number.

887521 is a deficient number, since it is larger than the sum of its proper divisors (5811).

887521 is a wasteful number, since it uses less digits than its factorization.

887521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5810.

The product of its digits is 4480, while the sum is 31.

The square root of 887521 is about 942.0833296476. The cubic root of 887521 is about 96.1006251035.

The spelling of 887521 in words is "eight hundred eighty-seven thousand, five hundred twenty-one".