121769 has 4 divisors (see below), whose sum is σ = 122496. Its totient is φ = 121044.

The previous prime is 121763. The next prime is 121787. The reversal of 121769 is 967121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 967121 = 29 ⋅33349.

It is a cyclic number.

It is not a de Polignac number, because 121769 - 2¹² = 117673 is a prime.

It is a super-2 number, since 2×121769² = 29655378722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121763) 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, 32 + ... + 494.

It is an arithmetic number, because the mean of its divisors is an integer number (30624).

2¹²¹⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

121769 is a deficient number, since it is larger than the sum of its proper divisors (727).

121769 is an equidigital number, since it uses as much as digits as its factorization.

121769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its digits is 756, while the sum is 26.

The square root of 121769 is about 348.9541517162. The cubic root of 121769 is about 49.5654339899.

The spelling of 121769 in words is "one hundred twenty-one thousand, seven hundred sixty-nine".