125503305 has 16 divisors (see below), whose sum is σ = 202389504. Its totient is φ = 66407040.

The previous prime is 125503289. The next prime is 125503319. The reversal of 125503305 is 503305521.

It is not a de Polignac number, because 125503305 - 2⁴ = 125503289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31036 + ... + 34845.

It is an arithmetic number, because the mean of its divisors is an integer number (12649344).

Almost surely, 2^125503305 is an apocalyptic number.

125503305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125503305 is a deficient number, since it is larger than the sum of its proper divisors (76886199).

125503305 is a wasteful number, since it uses less digits than its factorization.

125503305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66016.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 125503305 is about 11202.8257596019. The cubic root of 125503305 is about 500.6701746638.

Adding to 125503305 its reverse (503305521), we get a palindrome (628808826).

The spelling of 125503305 in words is "one hundred twenty-five million, five hundred three thousand, three hundred five".