125220305 has 16 divisors (see below), whose sum is σ = 173435904. Its totient is φ = 85012800.

The previous prime is 125220269. The next prime is 125220311. The reversal of 125220305 is 503022521.

It is not a de Polignac number, because 125220305 - 2¹⁸ = 124958161 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 15 ways as a sum of consecutive naturals, for example, 14177 + ... + 21246.

It is an arithmetic number, because the mean of its divisors is an integer number (10839744).

Almost surely, 2^125220305 is an apocalyptic number.

It is an amenable number.

125220305 is a deficient number, since it is larger than the sum of its proper divisors (48215599).

125220305 is a wasteful number, since it uses less digits than its factorization.

125220305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35536.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 125220305 is about 11190.1878893967. The cubic root of 125220305 is about 500.2935676024.

Adding to 125220305 its reverse (503022521), we get a palindrome (628242826).

The spelling of 125220305 in words is "one hundred twenty-five million, two hundred twenty thousand, three hundred five".