125665201 has 4 divisors (see below), whose sum is σ = 125701492. Its totient is φ = 125628912.

The previous prime is 125665181. The next prime is 125665217. The reversal of 125665201 is 102566521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102566521 = 5897 ⋅17393.

It can be written as a sum of positive squares in 2 ways, for example, as 77000625 + 48664576 = 8775^2 + 6976^2 .

It is a cyclic number.

It is not a de Polignac number, because 125665201 - 2⁷ = 125665073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125665201.

It is not an unprimeable number, because it can be changed into a prime (125665271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12330 + ... + 20083.

It is an arithmetic number, because the mean of its divisors is an integer number (31425373).

Almost surely, 2^125665201 is an apocalyptic number.

It is an amenable number.

125665201 is a deficient number, since it is larger than the sum of its proper divisors (36291).

125665201 is an equidigital number, since it uses as much as digits as its factorization.

125665201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36290.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 125665201 is about 11210.0491078318. The cubic root of 125665201 is about 500.8853659954.

It can be divided in two parts, 12566520 and 1, that added together give a palindrome (12566521).

The spelling of 125665201 in words is "one hundred twenty-five million, six hundred sixty-five thousand, two hundred one".