125771647 has 2 divisors, whose sum is σ = 125771648. Its totient is φ = 125771646.

The previous prime is 125771587. The next prime is 125771669. The reversal of 125771647 is 746177521.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (746177521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125771647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125771677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62885823 + 62885824.

It is an arithmetic number, because the mean of its divisors is an integer number (62885824).

Almost surely, 2^125771647 is an apocalyptic number.

125771647 is a deficient number, since it is larger than the sum of its proper divisors (1).

125771647 is an equidigital number, since it uses as much as digits as its factorization.

125771647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82320, while the sum is 40.

The square root of 125771647 is about 11214.7958964932. The cubic root of 125771647 is about 501.0267527809.

The spelling of 125771647 in words is "one hundred twenty-five million, seven hundred seventy-one thousand, six hundred forty-seven".