122287 has 4 divisors (see below), whose sum is σ = 133416. Its totient is φ = 111160.

The previous prime is 122279. The next prime is 122299. The reversal of 122287 is 782221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122287 - 2³ = 122279 is a prime.

It is a super-2 number, since 2×122287² = 29908220738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122207) by changing a digit.

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, 5548 + ... + 5569.

It is an arithmetic number, because the mean of its divisors is an integer number (33354).

2¹²²²⁸⁷ is an apocalyptic number.

122287 is a deficient number, since it is larger than the sum of its proper divisors (11129).

122287 is a wasteful number, since it uses less digits than its factorization.

122287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11128.

The product of its digits is 448, while the sum is 22.

The square root of 122287 is about 349.6955818995. The cubic root of 122287 is about 49.6356176272.

Subtracting from 122287 its sum of digits (22), we obtain a triangular number (122265 = T₄₉₄).

The spelling of 122287 in words is "one hundred twenty-two thousand, two hundred eighty-seven".