121087 has 4 divisors (see below), whose sum is σ = 127480. Its totient is φ = 114696.

The previous prime is 121081. The next prime is 121123. The reversal of 121087 is 780121.

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 121087 - 2¹¹ = 119039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 6373 = 121087 / (1 + 2 + 1 + 0 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121081) 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, 3168 + ... + 3205.

It is an arithmetic number, because the mean of its divisors is an integer number (31870).

2¹²¹⁰⁸⁷ is an apocalyptic number.

121087 is a deficient number, since it is larger than the sum of its proper divisors (6393).

121087 is an equidigital number, since it uses as much as digits as its factorization.

121087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 121087 is about 347.9755738554. The cubic root of 121087 is about 49.4727258517.

The spelling of 121087 in words is "one hundred twenty-one thousand, eighty-seven".