125971211 has 2 divisors, whose sum is σ = 125971212. Its totient is φ = 125971210.

The previous prime is 125971193. The next prime is 125971213. The reversal of 125971211 is 112179521.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (112179521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125971211 is a prime.

It is a Sophie Germain prime.

Together with 125971213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125971213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62985605 + 62985606.

It is an arithmetic number, because the mean of its divisors is an integer number (62985606).

Almost surely, 2^125971211 is an apocalyptic number.

125971211 is a deficient number, since it is larger than the sum of its proper divisors (1).

125971211 is an equidigital number, since it uses as much as digits as its factorization.

125971211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 29.

The square root of 125971211 is about 11223.6897230813. The cubic root of 125971211 is about 501.2916086214.

The spelling of 125971211 in words is "one hundred twenty-five million, nine hundred seventy-one thousand, two hundred eleven".