125545769 has 2 divisors, whose sum is σ = 125545770. Its totient is φ = 125545768.

The previous prime is 125545741. The next prime is 125545807. The reversal of 125545769 is 967545521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119355625 + 6190144 = 10925^2 + 2488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125545769 is a prime.

It is a super-2 number, since 2×125545769² = 31523480227602722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125545169) 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, 62772884 + 62772885.

It is an arithmetic number, because the mean of its divisors is an integer number (62772885).

Almost surely, 2^125545769 is an apocalyptic number.

It is an amenable number.

125545769 is a deficient number, since it is larger than the sum of its proper divisors (1).

125545769 is an equidigital number, since it uses as much as digits as its factorization.

125545769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 44.

The square root of 125545769 is about 11204.7208354336. The cubic root of 125545769 is about 500.7266354902.

The spelling of 125545769 in words is "one hundred twenty-five million, five hundred forty-five thousand, seven hundred sixty-nine".