121826 has 4 divisors (see below), whose sum is σ = 182742. Its totient is φ = 60912.

The previous prime is 121789. The next prime is 121843. The reversal of 121826 is 628121.

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

It can be written as a sum of positive squares in only one way, i.e., 121801 + 25 = 349^2 + 5^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121798 and 121807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30455 + ... + 30458.

2¹²¹⁸²⁶ is an apocalyptic number.

121826 is a deficient number, since it is larger than the sum of its proper divisors (60916).

121826 is an equidigital number, since it uses as much as digits as its factorization.

121826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60915.

The product of its digits is 192, while the sum is 20.

The square root of 121826 is about 349.0358147812. The cubic root of 121826 is about 49.5731666340.

Adding to 121826 its reverse (628121), we get a palindrome (749947).

It can be divided in two parts, 12 and 1826, that multiplied together give a palindrome (21912).

The spelling of 121826 in words is "one hundred twenty-one thousand, eight hundred twenty-six".