125245817 has 4 divisors (see below), whose sum is σ = 132613236. Its totient is φ = 117878400.

The previous prime is 125245793. The next prime is 125245819. The reversal of 125245817 is 718542521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 718542521 = 31 ⋅23178791.

It can be written as a sum of positive squares in 2 ways, for example, as 64577296 + 60668521 = 8036^2 + 7789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125245817 is a prime.

It is a super-3 number, since 3×125245817³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125245819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3683684 + ... + 3683717.

It is an arithmetic number, because the mean of its divisors is an integer number (33153309).

Almost surely, 2^125245817 is an apocalyptic number.

125245817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

125245817 is a deficient number, since it is larger than the sum of its proper divisors (7367419).

125245817 is an equidigital number, since it uses as much as digits as its factorization.

125245817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367418.

The product of its digits is 22400, while the sum is 35.

The square root of 125245817 is about 11191.3277585816. The cubic root of 125245817 is about 500.3275413864.

The spelling of 125245817 in words is "one hundred twenty-five million, two hundred forty-five thousand, eight hundred seventeen".