125212511 has 2 divisors, whose sum is σ = 125212512. Its totient is φ = 125212510.

The previous prime is 125212453. The next prime is 125212513. The reversal of 125212511 is 115212521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125212511 - 2¹⁰ = 125211487 is a prime.

Together with 125212513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125212513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62606255 + 62606256.

It is an arithmetic number, because the mean of its divisors is an integer number (62606256).

Almost surely, 2^125212511 is an apocalyptic number.

125212511 is a deficient number, since it is larger than the sum of its proper divisors (1).

125212511 is an equidigital number, since it uses as much as digits as its factorization.

125212511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200, while the sum is 20.

The square root of 125212511 is about 11189.8396324523. The cubic root of 125212511 is about 500.2831875793.

The spelling of 125212511 in words is "one hundred twenty-five million, two hundred twelve thousand, five hundred eleven".