122487 has 4 divisors (see below), whose sum is σ = 163320. Its totient is φ = 81656.

The previous prime is 122477. The next prime is 122489. The reversal of 122487 is 784221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784221 = 3 ⋅261407.

It is a cyclic number.

It is not a de Polignac number, because 122487 - 2⁴ = 122471 is a prime.

It is a D-number.

122487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122489) 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, 20412 + ... + 20417.

It is an arithmetic number, because the mean of its divisors is an integer number (40830).

2¹²²⁴⁸⁷ is an apocalyptic number.

122487 is a deficient number, since it is larger than the sum of its proper divisors (40833).

122487 is an equidigital number, since it uses as much as digits as its factorization.

122487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40832.

The product of its digits is 896, while the sum is 24.

The square root of 122487 is about 349.9814280787. The cubic root of 122487 is about 49.6626625202.

The spelling of 122487 in words is "one hundred twenty-two thousand, four hundred eighty-seven".