125683521 has 4 divisors (see below), whose sum is σ = 167578032. Its totient is φ = 83789012.

The previous prime is 125683513. The next prime is 125683531. The reversal of 125683521 is 125386521.

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 125683521 - 2³ = 125683513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125683501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20947251 + ... + 20947256.

It is an arithmetic number, because the mean of its divisors is an integer number (41894508).

Almost surely, 2^125683521 is an apocalyptic number.

It is an amenable number.

125683521 is a deficient number, since it is larger than the sum of its proper divisors (41894511).

125683521 is an equidigital number, since it uses as much as digits as its factorization.

125683521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41894510.

The product of its digits is 14400, while the sum is 33.

The square root of 125683521 is about 11210.8662020381. The cubic root of 125683521 is about 500.9097052024.

The spelling of 125683521 in words is "one hundred twenty-five million, six hundred eighty-three thousand, five hundred twenty-one".