987501 has 4 divisors (see below), whose sum is σ = 1316672. Its totient is φ = 658332.

The previous prime is 987491. The next prime is 987509. The reversal of 987501 is 105789.

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 987501 - 2⁹ = 986989 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987501.

It is not an unprimeable number, because it can be changed into a prime (987509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164581 + ... + 164586.

It is an arithmetic number, because the mean of its divisors is an integer number (329168).

2⁹⁸⁷⁵⁰¹ is an apocalyptic number.

It is an amenable number.

987501 is a deficient number, since it is larger than the sum of its proper divisors (329171).

987501 is a wasteful number, since it uses less digits than its factorization.

987501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329170.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 987501 is about 993.7308488721. The cubic root of 987501 is about 99.5816186785.

The spelling of 987501 in words is "nine hundred eighty-seven thousand, five hundred one".