125217311 has 2 divisors, whose sum is σ = 125217312. Its totient is φ = 125217310.

The previous prime is 125217299. The next prime is 125217329. The reversal of 125217311 is 113712521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125217311 - 2²⁶ = 58108447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125217341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62608655 + 62608656.

It is an arithmetic number, because the mean of its divisors is an integer number (62608656).

Almost surely, 2^125217311 is an apocalyptic number.

125217311 is a deficient number, since it is larger than the sum of its proper divisors (1).

125217311 is an equidigital number, since it uses as much as digits as its factorization.

125217311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 23.

The square root of 125217311 is about 11190.0541106824. The cubic root of 125217311 is about 500.2895802542.

Adding to 125217311 its reverse (113712521), we get a palindrome (238929832).

The spelling of 125217311 in words is "one hundred twenty-five million, two hundred seventeen thousand, three hundred eleven".