125079569 has 2 divisors, whose sum is σ = 125079570. Its totient is φ = 125079568.

The previous prime is 125079551. The next prime is 125079583. The reversal of 125079569 is 965970521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122389969 + 2689600 = 11063^2 + 1640^2 .

It is an emirp because it is prime and its reverse (965970521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125079569 is a prime.

It is a super-2 number, since 2×125079569² = 31289797162451522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125079169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62539784 + 62539785.

It is an arithmetic number, because the mean of its divisors is an integer number (62539785).

Almost surely, 2^125079569 is an apocalyptic number.

It is an amenable number.

125079569 is a deficient number, since it is larger than the sum of its proper divisors (1).

125079569 is an equidigital number, since it uses as much as digits as its factorization.

125079569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 44.

The square root of 125079569 is about 11183.8977552551. The cubic root of 125079569 is about 500.1060694969.

The spelling of 125079569 in words is "one hundred twenty-five million, seventy-nine thousand, five hundred sixty-nine".