125490903 has 4 divisors (see below), whose sum is σ = 167321208. Its totient is φ = 83660600.

The previous prime is 125490881. The next prime is 125490931. The reversal of 125490903 is 309094521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125490903 - 2¹⁰ = 125489879 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125490103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20915148 + ... + 20915153.

It is an arithmetic number, because the mean of its divisors is an integer number (41830302).

Almost surely, 2^125490903 is an apocalyptic number.

125490903 is a deficient number, since it is larger than the sum of its proper divisors (41830305).

125490903 is an equidigital number, since it uses as much as digits as its factorization.

125490903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41830304.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 125490903 is about 11202.2722248658. The cubic root of 125490903 is about 500.6536823597.

The spelling of 125490903 in words is "one hundred twenty-five million, four hundred ninety thousand, nine hundred three".