125205543 has 12 divisors (see below), whose sum is σ = 180993280. Its totient is φ = 83405376.

The previous prime is 125205541. The next prime is 125205547. The reversal of 125205543 is 345502521.

It is a happy number.

It is not a de Polignac number, because 125205543 - 2¹ = 125205541 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 (125205541) 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 11 ways as a sum of consecutive naturals, for example, 8730 + ... + 18072.

Almost surely, 2^125205543 is an apocalyptic number.

125205543 is a deficient number, since it is larger than the sum of its proper divisors (55787737).

125205543 is a wasteful number, since it uses less digits than its factorization.

125205543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10838 (or 10835 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 125205543 is about 11189.5282742393. The cubic root of 125205543 is about 500.2739072556.

The spelling of 125205543 in words is "one hundred twenty-five million, two hundred five thousand, five hundred forty-three".