125720543 has 4 divisors (see below), whose sum is σ = 135391368. Its totient is φ = 116049720.

The previous prime is 125720533. The next prime is 125720557. The reversal of 125720543 is 345027521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125720543 - 2⁶ = 125720479 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 (125720513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4835393 + ... + 4835418.

It is an arithmetic number, because the mean of its divisors is an integer number (33847842).

Almost surely, 2^125720543 is an apocalyptic number.

125720543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

125720543 is a deficient number, since it is larger than the sum of its proper divisors (9670825).

125720543 is an equidigital number, since it uses as much as digits as its factorization.

125720543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9670824.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 125720543 is about 11212.5172463635. The cubic root of 125720543 is about 500.9588839078.

The spelling of 125720543 in words is "one hundred twenty-five million, seven hundred twenty thousand, five hundred forty-three".