125303521 has 4 divisors (see below), whose sum is σ = 143204032. Its totient is φ = 107403012.

The previous prime is 125303509. The next prime is 125303531.

125303521 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125303521 - 2⁵ = 125303489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125303492 and 125303501.

It is not an unprimeable number, because it can be changed into a prime (125303531) 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, 8950245 + ... + 8950258.

It is an arithmetic number, because the mean of its divisors is an integer number (35801008).

Almost surely, 2^125303521 is an apocalyptic number.

It is an amenable number.

125303521 is a deficient number, since it is larger than the sum of its proper divisors (17900511).

125303521 is an equidigital number, since it uses as much as digits as its factorization.

125303521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17900510.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 125303521 is about 11193.9055293494. The cubic root of 125303521 is about 500.4043675523.

The spelling of 125303521 in words is "one hundred twenty-five million, three hundred three thousand, five hundred twenty-one".