987122 has 8 divisors (see below), whose sum is σ = 1567836. Its totient is φ = 464512.

The previous prime is 987101. The next prime is 987127. The reversal of 987122 is 221789.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 5041 = 991^2 + 71^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (987127) by changing a digit.

987122 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14483 + ... + 14550.

2⁹⁸⁷¹²² is an apocalyptic number.

987122 is a deficient number, since it is larger than the sum of its proper divisors (580714).

987122 is a wasteful number, since it uses less digits than its factorization.

987122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29052.

The product of its digits is 2016, while the sum is 29.

The square root of 987122 is about 993.5401350726. The cubic root of 987122 is about 99.5688773369.

The spelling of 987122 in words is "nine hundred eighty-seven thousand, one hundred twenty-two".