125823505 has 8 divisors (see below), whose sum is σ = 151253352. Its totient is φ = 100482048.

The previous prime is 125823487. The next prime is 125823517. The reversal of 125823505 is 505328521.

It can be written as a sum of positive squares in 4 ways, for example, as 65869456 + 59954049 = 8116^2 + 7743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125823505 - 2⁹ = 125822993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 18922 + ... + 24691.

It is an arithmetic number, because the mean of its divisors is an integer number (18906669).

Almost surely, 2^125823505 is an apocalyptic number.

It is an amenable number.

125823505 is a deficient number, since it is larger than the sum of its proper divisors (25429847).

125823505 is an equidigital number, since it uses as much as digits as its factorization.

125823505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44195.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 125823505 is about 11217.1076931623. The cubic root of 125823505 is about 501.0956042160.

The spelling of 125823505 in words is "one hundred twenty-five million, eight hundred twenty-three thousand, five hundred five".