121261 has 8 divisors (see below), whose sum is σ = 146880. Its totient is φ = 97728.

The previous prime is 121259. The next prime is 121267. The reversal of 121261 is 162121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121261 - 2¹ = 121259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121267) 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 7 ways as a sum of consecutive naturals, for example, 391 + ... + 628.

It is an arithmetic number, because the mean of its divisors is an integer number (18360).

2¹²¹²⁶¹ is an apocalyptic number.

It is an amenable number.

121261 is a deficient number, since it is larger than the sum of its proper divisors (25619).

121261 is a wasteful number, since it uses less digits than its factorization.

121261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043.

The product of its digits is 24, while the sum is 13.

The square root of 121261 is about 348.2255016509. The cubic root of 121261 is about 49.4964116706.

Adding to 121261 its reverse (162121), we get a palindrome (283382).

The spelling of 121261 in words is "one hundred twenty-one thousand, two hundred sixty-one".