121359 has 8 divisors (see below), whose sum is σ = 184960. Its totient is φ = 69336.

The previous prime is 121357. The next prime is 121367. The reversal of 121359 is 953121.

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

It is not a de Polignac number, because 121359 - 2¹ = 121357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5779 = 121359 / (1 + 2 + 1 + 3 + 5 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869 + ... + 2910.

It is an arithmetic number, because the mean of its divisors is an integer number (23120).

2¹²¹³⁵⁹ is an apocalyptic number.

121359 is a deficient number, since it is larger than the sum of its proper divisors (63601).

121359 is an equidigital number, since it uses as much as digits as its factorization.

121359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789.

The product of its digits is 270, while the sum is 21.

The square root of 121359 is about 348.3661866485. The cubic root of 121359 is about 49.5097419863.

The spelling of 121359 in words is "one hundred twenty-one thousand, three hundred fifty-nine".