125765191 has 2 divisors, whose sum is σ = 125765192. Its totient is φ = 125765190.

The previous prime is 125765177. The next prime is 125765209. The reversal of 125765191 is 191567521.

It is a weak prime.

It is an emirp because it is prime and its reverse (191567521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125765191 - 2¹³ = 125756999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125765191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125762191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62882595 + 62882596.

It is an arithmetic number, because the mean of its divisors is an integer number (62882596).

Almost surely, 2^125765191 is an apocalyptic number.

125765191 is a deficient number, since it is larger than the sum of its proper divisors (1).

125765191 is an equidigital number, since it uses as much as digits as its factorization.

125765191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 37.

The square root of 125765191 is about 11214.5080587603. The cubic root of 125765191 is about 501.0181798788.

The spelling of 125765191 in words is "one hundred twenty-five million, seven hundred sixty-five thousand, one hundred ninety-one".