121755 has 8 divisors (see below), whose sum is σ = 194832. Its totient is φ = 64928.

The previous prime is 121727. The next prime is 121763. The reversal of 121755 is 557121.

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 121755 - 2¹² = 117659 is a prime.

It is a super-3 number, since 3×121755³ = 5414790643331625, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4044 + ... + 4073.

It is an arithmetic number, because the mean of its divisors is an integer number (24354).

2¹²¹⁷⁵⁵ is an apocalyptic number.

121755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121755 is a deficient number, since it is larger than the sum of its proper divisors (73077).

121755 is an equidigital number, since it uses as much as digits as its factorization.

121755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125.

The product of its digits is 350, while the sum is 21.

The square root of 121755 is about 348.9340911978. The cubic root of 121755 is about 49.5635343749.

Adding to 121755 its reverse (557121), we get a palindrome (678876).

The spelling of 121755 in words is "one hundred twenty-one thousand, seven hundred fifty-five".