121677 has 4 divisors (see below), whose sum is σ = 162240. Its totient is φ = 81116.

The previous prime is 121661. The next prime is 121687. The reversal of 121677 is 776121.

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 an emirpimes, since its reverse is a distinct semiprime: 776121 = 3 ⋅258707.

It is a cyclic number.

It is not a de Polignac number, because 121677 - 2⁴ = 121661 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121677.

It is not an unprimeable number, because it can be changed into a prime (121607) 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, 20277 + ... + 20282.

It is an arithmetic number, because the mean of its divisors is an integer number (40560).

2¹²¹⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

121677 is a deficient number, since it is larger than the sum of its proper divisors (40563).

121677 is an equidigital number, since it uses as much as digits as its factorization.

121677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40562.

The product of its digits is 588, while the sum is 24.

The square root of 121677 is about 348.8223043327. The cubic root of 121677 is about 49.5529481388.

Adding to 121677 its product of digits (588), we get a triangular number (122265 = T₄₉₄).

Adding to 121677 its reverse (776121), we get a palindrome (897798).

The spelling of 121677 in words is "one hundred twenty-one thousand, six hundred seventy-seven".