125311 has 2 divisors, whose sum is σ = 125312. Its totient is φ = 125310.

The previous prime is 125303. The next prime is 125329. The reversal of 125311 is 113521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125311 - 2³ = 125303 is a prime.

It is a Chen prime.

125311 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 125291 and 125300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62655 + 62656.

It is an arithmetic number, because the mean of its divisors is an integer number (62656).

2¹²⁵³¹¹ is an apocalyptic number.

125311 is a deficient number, since it is larger than the sum of its proper divisors (1).

125311 is an equidigital number, since it uses as much as digits as its factorization.

125311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30, while the sum is 13.

The square root of 125311 is about 353.9929377827. The cubic root of 125311 is about 50.0414323244.

Adding to 125311 its reverse (113521), we get a palindrome (238832).

The spelling of 125311 in words is "one hundred twenty-five thousand, three hundred eleven".