125804817 has 6 divisors (see below), whose sum is σ = 181718082. Its totient is φ = 83869872.

The previous prime is 125804807. The next prime is 125804837. The reversal of 125804817 is 718408521.

It can be written as a sum of positive squares in only one way, i.e., 114575616 + 11229201 = 10704^2 + 3351^2 .

It is not a de Polignac number, because 125804817 - 2⁴ = 125804801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125804807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6989148 + ... + 6989165.

It is an arithmetic number, because the mean of its divisors is an integer number (30286347).

Almost surely, 2^125804817 is an apocalyptic number.

It is an amenable number.

125804817 is a deficient number, since it is larger than the sum of its proper divisors (55913265).

125804817 is a wasteful number, since it uses less digits than its factorization.

125804817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13978319 (or 13978316 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 125804817 is about 11216.2746489198. The cubic root of 125804817 is about 501.0707944946.

It can be divided in two parts, 125804 and 817, that added together give a palindrome (126621).

The spelling of 125804817 in words is "one hundred twenty-five million, eight hundred four thousand, eight hundred seventeen".