125722173 has 4 divisors (see below), whose sum is σ = 167629568. Its totient is φ = 83814780.

The previous prime is 125722171. The next prime is 125722187. The reversal of 125722173 is 371227521.

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 not a de Polignac number, because 125722173 - 2¹ = 125722171 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 125722173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125722171) 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, 20953693 + ... + 20953698.

It is an arithmetic number, because the mean of its divisors is an integer number (41907392).

Almost surely, 2^125722173 is an apocalyptic number.

It is an amenable number.

125722173 is a deficient number, since it is larger than the sum of its proper divisors (41907395).

125722173 is an equidigital number, since it uses as much as digits as its factorization.

125722173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41907394.

The product of its digits is 5880, while the sum is 30.

The square root of 125722173 is about 11212.5899327497. The cubic root of 125722173 is about 500.9610489198.

Adding to 125722173 its reverse (371227521), we get a palindrome (496949694).

The spelling of 125722173 in words is "one hundred twenty-five million, seven hundred twenty-two thousand, one hundred seventy-three".