19775125 has 8 divisors (see below), whose sum is σ = 24679512. Its totient is φ = 15820000.

The previous prime is 19775123. The next prime is 19775149. The reversal of 19775125 is 52157791.

It can be written as a sum of positive squares in 4 ways, for example, as 5098564 + 14676561 = 2258^2 + 3831^2 .

It is not a de Polignac number, because 19775125 - 2¹ = 19775123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19775123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78976 + ... + 79225.

It is an arithmetic number, because the mean of its divisors is an integer number (3084939).

Almost surely, 2^19775125 is an apocalyptic number.

It is an amenable number.

19775125 is a deficient number, since it is larger than the sum of its proper divisors (4904387).

19775125 is an equidigital number, since it uses as much as digits as its factorization.

19775125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158216 (or 158206 counting only the distinct ones).

The product of its digits is 22050, while the sum is 37.

The square root of 19775125 is about 4446.9230935558. The cubic root of 19775125 is about 270.4205836498.

It can be divided in two parts, 19775 and 125, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 19775125 in words is "nineteen million, seven hundred seventy-five thousand, one hundred twenty-five".