Search a number
-
+
121243 = 263461
BaseRepresentation
bin11101100110011011
320011022111
4131212123
512334433
62333151
71013323
oct354633
9204274
10121243
1183101
125a1b7
1343255
1432283
1525dcd
hex1d99b

121243 has 4 divisors (see below), whose sum is σ = 121968. Its totient is φ = 120520.

The previous prime is 121229. The next prime is 121259. The reversal of 121243 is 342121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 342121 = 1326317.

It is a cyclic number.

It is not a de Polignac number, because 121243 - 213 = 113051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121283) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 33 + ... + 493.

It is an arithmetic number, because the mean of its divisors is an integer number (30492).

2121243 is an apocalyptic number.

121243 is a deficient number, since it is larger than the sum of its proper divisors (725).

121243 is an equidigital number, since it uses as much as digits as its factorization.

121243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its digits is 48, while the sum is 13.

The square root of 121243 is about 348.1996553703. The cubic root of 121243 is about 49.4939624647.

Adding to 121243 its reverse (342121), we get a palindrome (463364).

It can be divided in two parts, 121 and 243, that multiplied together give a triangular number (29403 = T242).

The spelling of 121243 in words is "one hundred twenty-one thousand, two hundred forty-three", and thus it is an iban number.

Divisors: 1 263 461 121243