125824549 has 4 divisors (see below), whose sum is σ = 125988940. Its totient is φ = 125660160.

The previous prime is 125824547. The next prime is 125824553. The reversal of 125824549 is 945428521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945428521 = 853 ⋅1108357.

It can be written as a sum of positive squares in 2 ways, for example, as 22944100 + 102880449 = 4790^2 + 10143^2 .

It is a cyclic number.

It is not a de Polignac number, because 125824549 - 2¹ = 125824547 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 (125824547) 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, 81042 + ... + 82579.

It is an arithmetic number, because the mean of its divisors is an integer number (31497235).

Almost surely, 2^125824549 is an apocalyptic number.

It is an amenable number.

125824549 is a deficient number, since it is larger than the sum of its proper divisors (164391).

125824549 is an equidigital number, since it uses as much as digits as its factorization.

125824549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164390.

The product of its digits is 115200, while the sum is 40.

The square root of 125824549 is about 11217.1542291260. The cubic root of 125824549 is about 501.0969901318.

The spelling of 125824549 in words is "one hundred twenty-five million, eight hundred twenty-four thousand, five hundred forty-nine".