125771489 has 2 divisors, whose sum is σ = 125771490. Its totient is φ = 125771488.

The previous prime is 125771479. The next prime is 125771531. The reversal of 125771489 is 984177521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123032464 + 2739025 = 11092^2 + 1655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125771489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125771449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62885744 + 62885745.

It is an arithmetic number, because the mean of its divisors is an integer number (62885745).

Almost surely, 2^125771489 is an apocalyptic number.

It is an amenable number.

125771489 is a deficient number, since it is larger than the sum of its proper divisors (1).

125771489 is an equidigital number, since it uses as much as digits as its factorization.

125771489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 44.

The square root of 125771489 is about 11214.7888522254. The cubic root of 125771489 is about 501.0265429767.

The spelling of 125771489 in words is "one hundred twenty-five million, seven hundred seventy-one thousand, four hundred eighty-nine".