125123433521 has 8 divisors (see below), whose sum is σ = 129163743744. Its totient is φ = 121083377760.

The previous prime is 125123433329. The next prime is 125123433557. The reversal of 125123433521 is 125334321521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125123433521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125123433571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846781 + ... + 1913333.

It is an arithmetic number, because the mean of its divisors is an integer number (16145467968).

Almost surely, 2^125123433521 is an apocalyptic number.

It is an amenable number.

125123433521 is a deficient number, since it is larger than the sum of its proper divisors (4040310223).

125123433521 is an equidigital number, since it uses as much as digits as its factorization.

125123433521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127231.

The product of its digits is 21600, while the sum is 32.

The spelling of 125123433521 in words is "one hundred twenty-five billion, one hundred twenty-three million, four hundred thirty-three thousand, five hundred twenty-one".