125722643 has 2 divisors, whose sum is σ = 125722644. Its totient is φ = 125722642.

The previous prime is 125722631. The next prime is 125722661. The reversal of 125722643 is 346227521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125722643 - 2¹⁰ = 125721619 is a prime.

It is not a weakly prime, because it can be changed into another prime (125722693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62861321 + 62861322.

It is an arithmetic number, because the mean of its divisors is an integer number (62861322).

Almost surely, 2^125722643 is an apocalyptic number.

125722643 is a deficient number, since it is larger than the sum of its proper divisors (1).

125722643 is an equidigital number, since it uses as much as digits as its factorization.

125722643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 125722643 is about 11212.6108913134. The cubic root of 125722643 is about 500.9616731835.

The spelling of 125722643 in words is "one hundred twenty-five million, seven hundred twenty-two thousand, six hundred forty-three".