125785619 has 2 divisors, whose sum is σ = 125785620. Its totient is φ = 125785618.

The previous prime is 125785613. The next prime is 125785637. The reversal of 125785619 is 916587521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125785619 is a prime.

It is a super-2 number, since 2×125785619² = 31644043894426322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125785619.

It is not a weakly prime, because it can be changed into another prime (125785613) 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, 62892809 + 62892810.

It is an arithmetic number, because the mean of its divisors is an integer number (62892810).

Almost surely, 2^125785619 is an apocalyptic number.

125785619 is a deficient number, since it is larger than the sum of its proper divisors (1).

125785619 is an equidigital number, since it uses as much as digits as its factorization.

125785619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 44.

The square root of 125785619 is about 11215.4188062684. The cubic root of 125785619 is about 501.0453051514.

The spelling of 125785619 in words is "one hundred twenty-five million, seven hundred eighty-five thousand, six hundred nineteen".