125640543 has 8 divisors (see below), whose sum is σ = 191452288. Its totient is φ = 71794584.

The previous prime is 125640509. The next prime is 125640547. The reversal of 125640543 is 345046521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125640543 - 2¹⁴ = 125624159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125640543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125640547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2991421 + ... + 2991462.

It is an arithmetic number, because the mean of its divisors is an integer number (23931536).

Almost surely, 2^125640543 is an apocalyptic number.

125640543 is a deficient number, since it is larger than the sum of its proper divisors (65811745).

125640543 is an equidigital number, since it uses as much as digits as its factorization.

125640543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5982893.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 125640543 is about 11208.9492371051. The cubic root of 125640543 is about 500.8526026444.

The spelling of 125640543 in words is "one hundred twenty-five million, six hundred forty thousand, five hundred forty-three".