121841 has 6 divisors (see below), whose sum is σ = 126630. Its totient is φ = 117216.

The previous prime is 121789. The next prime is 121843. The reversal of 121841 is 148121.

It can be written as a sum of positive squares in 3 ways, for example, as 48400 + 73441 = 220^2 + 271^2 .

It is not a de Polignac number, because 121841 - 2¹⁰ = 120817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1325 + ... + 1413.

It is an arithmetic number, because the mean of its divisors is an integer number (21105).

2¹²¹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

121841 is a deficient number, since it is larger than the sum of its proper divisors (4789).

121841 is an frugal number, since it uses more digits than its factorization.

121841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 126 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

The square root of 121841 is about 349.0573018861. The cubic root of 121841 is about 49.5752011395.

Adding to 121841 its reverse (148121), we get a palindrome (269962).

It can be divided in two parts, 121 and 841, that multiplied together give a square (101761 = 319²).

The spelling of 121841 in words is "one hundred twenty-one thousand, eight hundred forty-one".