125266565 has 4 divisors (see below), whose sum is σ = 150319884. Its totient is φ = 100213248.

The previous prime is 125266543. The next prime is 125266651. The reversal of 125266565 is 565662521.

It is a happy number.

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 40018276 + 85248289 = 6326^2 + 9233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125266565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12526652 + ... + 12526661.

It is an arithmetic number, because the mean of its divisors is an integer number (37579971).

Almost surely, 2^125266565 is an apocalyptic number.

It is an amenable number.

125266565 is a deficient number, since it is larger than the sum of its proper divisors (25053319).

125266565 is an equidigital number, since it uses as much as digits as its factorization.

125266565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25053318.

The product of its digits is 108000, while the sum is 38.

The square root of 125266565 is about 11192.2546879527. The cubic root of 125266565 is about 500.3551676521.

It can be divided in two parts, 12526 and 6565, that added together give a palindrome (19091).

The spelling of 125266565 in words is "one hundred twenty-five million, two hundred sixty-six thousand, five hundred sixty-five".