125263889 has 4 divisors (see below), whose sum is σ = 125343924. Its totient is φ = 125183856.

The previous prime is 125263867. The next prime is 125263891. The reversal of 125263889 is 988362521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25603600 + 99660289 = 5060^2 + 9983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125263889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125262889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37622 + ... + 40815.

It is an arithmetic number, because the mean of its divisors is an integer number (31335981).

Almost surely, 2^125263889 is an apocalyptic number.

It is an amenable number.

125263889 is a deficient number, since it is larger than the sum of its proper divisors (80035).

125263889 is an equidigital number, since it uses as much as digits as its factorization.

125263889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80034.

The product of its digits is 207360, while the sum is 44.

The square root of 125263889 is about 11192.1351403564. The cubic root of 125263889 is about 500.3516046903.

The spelling of 125263889 in words is "one hundred twenty-five million, two hundred sixty-three thousand, eight hundred eighty-nine".