125778543 has 16 divisors (see below), whose sum is σ = 183417600. Its totient is φ = 76034880.

The previous prime is 125778493. The next prime is 125778557. The reversal of 125778543 is 345877521.

It is not a de Polignac number, because 125778543 - 2⁸ = 125778287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125778495 and 125778504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125778643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8838 + ... + 18156.

It is an arithmetic number, because the mean of its divisors is an integer number (11463600).

Almost surely, 2^125778543 is an apocalyptic number.

125778543 is a deficient number, since it is larger than the sum of its proper divisors (57639057).

125778543 is a wasteful number, since it uses less digits than its factorization.

125778543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9742.

The product of its digits is 235200, while the sum is 42.

The square root of 125778543 is about 11215.1033432599. The cubic root of 125778543 is about 501.0359096336.

It can be divided in two parts, 1257 and 78543, that added together give a triangular number (79800 = T₃₉₉).

The spelling of 125778543 in words is "one hundred twenty-five million, seven hundred seventy-eight thousand, five hundred forty-three".