125091817 has 4 divisors (see below), whose sum is σ = 125259136. Its totient is φ = 124924500.

The previous prime is 125091809. The next prime is 125091887. The reversal of 125091817 is 718190521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125091817 - 2³ = 125091809 is a prime.

It is a super-2 number, since 2×125091817² = 31295925360722978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125091887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82533 + ... + 84034.

It is an arithmetic number, because the mean of its divisors is an integer number (31314784).

Almost surely, 2^125091817 is an apocalyptic number.

It is an amenable number.

125091817 is a deficient number, since it is larger than the sum of its proper divisors (167319).

125091817 is an equidigital number, since it uses as much as digits as its factorization.

125091817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167318.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 125091817 is about 11184.4453148111. The cubic root of 125091817 is about 500.1223927043.

The spelling of 125091817 in words is "one hundred twenty-five million, ninety-one thousand, eight hundred seventeen".