87122 has 16 divisors (see below), whose sum is σ = 153600. Its totient is φ = 37044.

The previous prime is 87121. The next prime is 87133. The reversal of 87122 is 22178.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 87094 and 87103.

It is not an unprimeable number, because it can be changed into a prime (87121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 623 + ... + 749.

It is an arithmetic number, because the mean of its divisors is an integer number (9600).

2⁸⁷¹²² is an apocalyptic number.

87122 is a deficient number, since it is larger than the sum of its proper divisors (66478).

87122 is a wasteful number, since it uses less digits than its factorization.

87122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 136 counting only the distinct ones).

The product of its digits is 224, while the sum is 20.

The square root of 87122 is about 295.1643609923. The cubic root of 87122 is about 44.3311787195.

It can be divided in two parts, 8712 and 2, that multiplied together give a square (17424 = 132²).

The spelling of 87122 in words is "eighty-seven thousand, one hundred twenty-two".