125728279 has 2 divisors, whose sum is σ = 125728280. Its totient is φ = 125728278.

The previous prime is 125728271. The next prime is 125728307. The reversal of 125728279 is 972827521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125728279 - 2³ = 125728271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125728271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62864139 + 62864140.

It is an arithmetic number, because the mean of its divisors is an integer number (62864140).

Almost surely, 2^125728279 is an apocalyptic number.

125728279 is a deficient number, since it is larger than the sum of its proper divisors (1).

125728279 is an equidigital number, since it uses as much as digits as its factorization.

125728279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 125728279 is about 11212.8622126556. The cubic root of 125728279 is about 500.9691589149.

The spelling of 125728279 in words is "one hundred twenty-five million, seven hundred twenty-eight thousand, two hundred seventy-nine".