125784445 has 8 divisors (see below), whose sum is σ = 159820344. Its totient is φ = 94708224.

The previous prime is 125784443. The next prime is 125784467. The reversal of 125784445 is 544487521.

It can be written as a sum of positive squares in 4 ways, for example, as 9597604 + 116186841 = 3098^2 + 10779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125784445 - 2¹ = 125784443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125784398 and 125784407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125784443) 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 7 ways as a sum of consecutive naturals, for example, 739824 + ... + 739993.

It is an arithmetic number, because the mean of its divisors is an integer number (19977543).

Almost surely, 2^125784445 is an apocalyptic number.

It is an amenable number.

125784445 is a deficient number, since it is larger than the sum of its proper divisors (34035899).

125784445 is a wasteful number, since it uses less digits than its factorization.

125784445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479839.

The product of its digits is 179200, while the sum is 40.

The square root of 125784445 is about 11215.3664674856. The cubic root of 125784445 is about 501.0437463377.

The spelling of 125784445 in words is "one hundred twenty-five million, seven hundred eighty-four thousand, four hundred forty-five".