125221 has 2 divisors, whose sum is σ = 125222. Its totient is φ = 125220.

The previous prime is 125219. The next prime is 125231. The reversal of 125221 is 122521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112225 + 12996 = 335^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 125221 - 2¹ = 125219 is a prime.

Together with 125219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62610 + 62611.

It is an arithmetic number, because the mean of its divisors is an integer number (62611).

2¹²⁵²²¹ is an apocalyptic number.

It is an amenable number.

125221 is a deficient number, since it is larger than the sum of its proper divisors (1).

125221 is an equidigital number, since it uses as much as digits as its factorization.

125221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40, while the sum is 13.

The square root of 125221 is about 353.8657937693. The cubic root of 125221 is about 50.0294493180.

Adding to 125221 its reverse (122521), we get a palindrome (247742).

The spelling of 125221 in words is "one hundred twenty-five thousand, two hundred twenty-one".