987520 has 32 divisors (see below), whose sum is σ = 2362320. Its totient is φ = 394752.

The previous prime is 987509. The next prime is 987523. The reversal of 987520 is 25789.

It is a tau number, because it is divible by the number of its divisors (32).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987523) by changing a digit.

987520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 132 + ... + 1411.

2⁹⁸⁷⁵²⁰ is an apocalyptic number.

It is an amenable number.

987520 is an abundant number, since it is smaller than the sum of its proper divisors (1374800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

987520 is a wasteful number, since it uses less digits than its factorization.

987520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 987520 is about 993.7404087587. The cubic root of 987520 is about 99.5822573407.

The spelling of 987520 in words is "nine hundred eighty-seven thousand, five hundred twenty".