121853 has 2 divisors, whose sum is σ = 121854. Its totient is φ = 121852.

The previous prime is 121843. The next prime is 121867. The reversal of 121853 is 358121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120409 + 1444 = 347^2 + 38^2 .

It is a cyclic number.

It is not a de Polignac number, because 121853 - 2⁶ = 121789 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60926 + 60927.

It is an arithmetic number, because the mean of its divisors is an integer number (60927).

2¹²¹⁸⁵³ is an apocalyptic number.

It is an amenable number.

121853 is a deficient number, since it is larger than the sum of its proper divisors (1).

121853 is an equidigital number, since it uses as much as digits as its factorization.

121853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 121853 is about 349.0744906177. The cubic root of 121853 is about 49.5768286236.

Adding to 121853 its reverse (358121), we get a palindrome (479974).

The spelling of 121853 in words is "one hundred twenty-one thousand, eight hundred fifty-three".