987912 has 24 divisors (see below), whose sum is σ = 2675790. Its totient is φ = 329280.

The previous prime is 987911. The next prime is 987913. The reversal of 987912 is 219789.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (987911) and next prime (987913).

It can be written as a sum of positive squares in only one way, i.e., 933156 + 54756 = 966^2 + 234^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (987911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6789 + ... + 6932.

2⁹⁸⁷⁹¹² is an apocalyptic number.

It is an amenable number.

987912 is an abundant number, since it is smaller than the sum of its proper divisors (1687878).

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

987912 is a wasteful number, since it uses less digits than its factorization.

987912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13733 (or 13726 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 987912 is about 993.9376237974. The cubic root of 987912 is about 99.5954321222.

The spelling of 987912 in words is "nine hundred eighty-seven thousand, nine hundred twelve".