121827 has 4 divisors (see below), whose sum is σ = 162440. Its totient is φ = 81216.

The previous prime is 121789. The next prime is 121843. The reversal of 121827 is 728121.

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

It is not a de Polignac number, because 121827 - 2⁶ = 121763 is a prime.

It is a d-powerful number, because it can be written as 1 + 2⁴ + 8² + 1 + 2¹² + 7⁶ .

It is a D-number.

It is a Duffinian number.

121827 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (121867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20302 + ... + 20307.

It is an arithmetic number, because the mean of its divisors is an integer number (40610).

2¹²¹⁸²⁷ is an apocalyptic number.

121827 is a deficient number, since it is larger than the sum of its proper divisors (40613).

121827 is an equidigital number, since it uses as much as digits as its factorization.

121827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40612.

The product of its digits is 224, while the sum is 21.

The square root of 121827 is about 349.0372472960. The cubic root of 121827 is about 49.5733022729.

Adding to 121827 its reverse (728121), we get a palindrome (849948).

The spelling of 121827 in words is "one hundred twenty-one thousand, eight hundred twenty-seven".