121849 has 12 divisors (see below), whose sum is σ = 152256. Its totient is φ = 95472.

The previous prime is 121843. The next prime is 121853. The reversal of 121849 is 948121.

It is a happy number.

It is not a de Polignac number, because 121849 - 2⁷ = 121721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121843) 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 11 ways as a sum of consecutive naturals, for example, 1132 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (12688).

2¹²¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

121849 is a deficient number, since it is larger than the sum of its proper divisors (30407).

121849 is a wasteful number, since it uses less digits than its factorization.

121849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 123 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 121849 is about 349.0687611345. The cubic root of 121849 is about 49.5762861408.

The spelling of 121849 in words is "one hundred twenty-one thousand, eight hundred forty-nine".