125403643 has 2 divisors, whose sum is σ = 125403644. Its totient is φ = 125403642.

The previous prime is 125403601. The next prime is 125403689. The reversal of 125403643 is 346304521.

It is a weak prime.

It is an emirp because it is prime and its reverse (346304521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125403643 is a prime.

It is not a weakly prime, because it can be changed into another prime (125401643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62701821 + 62701822.

It is an arithmetic number, because the mean of its divisors is an integer number (62701822).

Almost surely, 2^125403643 is an apocalyptic number.

125403643 is a deficient number, since it is larger than the sum of its proper divisors (1).

125403643 is an equidigital number, since it uses as much as digits as its factorization.

125403643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 125403643 is about 11198.3768020191. The cubic root of 125403643 is about 500.5376124053.

The spelling of 125403643 in words is "one hundred twenty-five million, four hundred three thousand, six hundred forty-three".