125517311 has 2 divisors, whose sum is σ = 125517312. Its totient is φ = 125517310.

The previous prime is 125517299. The next prime is 125517317. The reversal of 125517311 is 113715521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125517311 - 2⁶ = 125517247 is a prime.

It is a super-3 number, since 3×125517311³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125517317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62758655 + 62758656.

It is an arithmetic number, because the mean of its divisors is an integer number (62758656).

Almost surely, 2^125517311 is an apocalyptic number.

125517311 is a deficient number, since it is larger than the sum of its proper divisors (1).

125517311 is an equidigital number, since it uses as much as digits as its factorization.

125517311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1050, while the sum is 26.

The square root of 125517311 is about 11203.4508523044. The cubic root of 125517311 is about 500.6887986770.

The spelling of 125517311 in words is "one hundred twenty-five million, five hundred seventeen thousand, three hundred eleven".