121867 has 2 divisors, whose sum is σ = 121868. Its totient is φ = 121866.

The previous prime is 121853. The next prime is 121883. The reversal of 121867 is 768121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121867 is a prime.

121867 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (121067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60933 + 60934.

It is an arithmetic number, because the mean of its divisors is an integer number (60934).

2¹²¹⁸⁶⁷ is an apocalyptic number.

121867 is a deficient number, since it is larger than the sum of its proper divisors (1).

121867 is an equidigital number, since it uses as much as digits as its factorization.

121867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 121867 is about 349.0945430682. The cubic root of 121867 is about 49.5787272200.

Adding to 121867 its reverse (768121), we get a palindrome (889988).

The spelling of 121867 in words is "one hundred twenty-one thousand, eight hundred sixty-seven".