125423521 has 8 divisors (see below), whose sum is σ = 129913920. Its totient is φ = 120944208.

The previous prime is 125423509. The next prime is 125423527. The reversal of 125423521 is 125324521.

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

It is a cyclic number.

It is not a de Polignac number, because 125423521 - 2¹⁷ = 125292449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125423527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25180 + ... + 29746.

It is an arithmetic number, because the mean of its divisors is an integer number (16239240).

Almost surely, 2^125423521 is an apocalyptic number.

It is an amenable number.

125423521 is a deficient number, since it is larger than the sum of its proper divisors (4490399).

125423521 is an equidigital number, since it uses as much as digits as its factorization.

125423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543.

The product of its digits is 2400, while the sum is 25.

The square root of 125423521 is about 11199.2643061944. The cubic root of 125423521 is about 500.5640581043.

The spelling of 125423521 in words is "one hundred twenty-five million, four hundred twenty-three thousand, five hundred twenty-one".