125724445 has 36 divisors (see below), whose sum is σ = 192951612. Its totient is φ = 78355200.

The previous prime is 125724439. The next prime is 125724449. The reversal of 125724445 is 544427521.

It can be written as a sum of positive squares in 2 ways, for example, as 94128804 + 31595641 = 9702^2 + 5621^2 .

It is not a de Polignac number, because 125724445 - 2⁷ = 125724317 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 125724445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125724449) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27525 + ... + 31765.

It is an arithmetic number, because the mean of its divisors is an integer number (5359767).

Almost surely, 2^125724445 is an apocalyptic number.

It is an amenable number.

125724445 is a deficient number, since it is larger than the sum of its proper divisors (67227167).

125724445 is a wasteful number, since it uses less digits than its factorization.

125724445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282 (or 4264 counting only the distinct ones).

The product of its digits is 44800, while the sum is 34.

The square root of 125724445 is about 11212.6912469755. The cubic root of 125724445 is about 500.9640666231.

The spelling of 125724445 in words is "one hundred twenty-five million, seven hundred twenty-four thousand, four hundred forty-five".