121571 has 2 divisors, whose sum is σ = 121572. Its totient is φ = 121570.

The previous prime is 121559. The next prime is 121577. The reversal of 121571 is 175121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121571 - 2⁶ = 121507 is a prime.

It is a Chen prime.

It is a plaindrome in base 6.

It is not a weakly prime, because it can be changed into another prime (121577) 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 as a sum of consecutive naturals, namely, 60785 + 60786.

It is an arithmetic number, because the mean of its divisors is an integer number (60786).

2¹²¹⁵⁷¹ is an apocalyptic number.

121571 is a deficient number, since it is larger than the sum of its proper divisors (1).

121571 is an equidigital number, since it uses as much as digits as its factorization.

121571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70, while the sum is 17.

The square root of 121571 is about 348.6703314020. The cubic root of 121571 is about 49.5385544612.

Adding to 121571 its reverse (175121), we get a palindrome (296692).

The spelling of 121571 in words is "one hundred twenty-one thousand, five hundred seventy-one".