125755549 has 4 divisors (see below), whose sum is σ = 125879740. Its totient is φ = 125631360.

The previous prime is 125755537. The next prime is 125755573. The reversal of 125755549 is 945557521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945557521 = 3343 ⋅282847.

It can be written as a sum of positive squares in 2 ways, for example, as 85433049 + 40322500 = 9243^2 + 6350^2 .

It is a cyclic number.

It is not a de Polignac number, because 125755549 - 2⁹ = 125755037 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 (125755529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60564 + ... + 62605.

It is an arithmetic number, because the mean of its divisors is an integer number (31469935).

Almost surely, 2^125755549 is an apocalyptic number.

It is an amenable number.

125755549 is a deficient number, since it is larger than the sum of its proper divisors (124191).

125755549 is a wasteful number, since it uses less digits than its factorization.

125755549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124190.

The product of its digits is 315000, while the sum is 43.

The square root of 125755549 is about 11214.0781609546. The cubic root of 125755549 is about 501.0053757509.

The spelling of 125755549 in words is "one hundred twenty-five million, seven hundred fifty-five thousand, five hundred forty-nine".