125803543 has 4 divisors (see below), whose sum is σ = 126208368. Its totient is φ = 125398720.

The previous prime is 125803511. The next prime is 125803571. The reversal of 125803543 is 345308521.

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 125803543 - 2⁵ = 125803511 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 (125803343) 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, 201946 + ... + 202567.

It is an arithmetic number, because the mean of its divisors is an integer number (31552092).

Almost surely, 2^125803543 is an apocalyptic number.

125803543 is a deficient number, since it is larger than the sum of its proper divisors (404825).

125803543 is an equidigital number, since it uses as much as digits as its factorization.

125803543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404824.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 125803543 is about 11216.2178563008. The cubic root of 125803543 is about 501.0691030746.

The spelling of 125803543 in words is "one hundred twenty-five million, eight hundred three thousand, five hundred forty-three".