125820529 has 2 divisors, whose sum is σ = 125820530. Its totient is φ = 125820528.

The previous prime is 125820523. The next prime is 125820533. The reversal of 125820529 is 925028521.

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., 104448400 + 21372129 = 10220^2 + 4623^2 .

It is a cyclic number.

It is not a de Polignac number, because 125820529 - 2²³ = 117431921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125820494 and 125820503.

It is not a weakly prime, because it can be changed into another prime (125820523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62910264 + 62910265.

It is an arithmetic number, because the mean of its divisors is an integer number (62910265).

Almost surely, 2^125820529 is an apocalyptic number.

It is an amenable number.

125820529 is a deficient number, since it is larger than the sum of its proper divisors (1).

125820529 is an equidigital number, since it uses as much as digits as its factorization.

125820529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 125820529 is about 11216.9750378611. The cubic root of 125820529 is about 501.0916535173.

The spelling of 125820529 in words is "one hundred twenty-five million, eight hundred twenty thousand, five hundred twenty-nine".