125356543 has 4 divisors (see below), whose sum is σ = 134999368. Its totient is φ = 115713720.

The previous prime is 125356541. The next prime is 125356559. The reversal of 125356543 is 345653521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345653521 = 6563 ⋅52667.

It is a cyclic number.

It is not a de Polignac number, because 125356543 - 2¹ = 125356541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125356499 and 125356508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125356541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4821393 + ... + 4821418.

It is an arithmetic number, because the mean of its divisors is an integer number (33749842).

Almost surely, 2^125356543 is an apocalyptic number.

125356543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

125356543 is a deficient number, since it is larger than the sum of its proper divisors (9642825).

125356543 is an equidigital number, since it uses as much as digits as its factorization.

125356543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642824.

The product of its digits is 54000, while the sum is 34.

The square root of 125356543 is about 11196.2736211652. The cubic root of 125356543 is about 500.4749393890.

The spelling of 125356543 in words is "one hundred twenty-five million, three hundred fifty-six thousand, five hundred forty-three".