125266789 has 2 divisors, whose sum is σ = 125266790. Its totient is φ = 125266788.

The previous prime is 125266787. The next prime is 125266811. The reversal of 125266789 is 987662521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84088900 + 41177889 = 9170^2 + 6417^2 .

It is an emirp because it is prime and its reverse (987662521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125266789 - 2¹ = 125266787 is a prime.

It is a super-3 number, since 3×125266789³ (a number of 25 digits) contains 333 as substring.

Together with 125266787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125266781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62633394 + 62633395.

It is an arithmetic number, because the mean of its divisors is an integer number (62633395).

Almost surely, 2^125266789 is an apocalyptic number.

It is an amenable number.

125266789 is a deficient number, since it is larger than the sum of its proper divisors (1).

125266789 is an equidigital number, since it uses as much as digits as its factorization.

125266789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 125266789 is about 11192.2646948685. The cubic root of 125266789 is about 500.3554658948.

The spelling of 125266789 in words is "one hundred twenty-five million, two hundred sixty-six thousand, seven hundred eighty-nine".