125504443421 has 8 divisors (see below), whose sum is σ = 144161740800. Its totient is φ = 107029168848.

The previous prime is 125504443397. The next prime is 125504443433. The reversal of 125504443421 is 124344405521.

It is a happy number.

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

It is not a de Polignac number, because 125504443421 - 2⁶ = 125504443357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125504443481) 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 7 ways as a sum of consecutive naturals, for example, 45504221 + ... + 45506978.

It is an arithmetic number, because the mean of its divisors is an integer number (18020217600).

Almost surely, 2^125504443421 is an apocalyptic number.

It is an amenable number.

125504443421 is a deficient number, since it is larger than the sum of its proper divisors (18657297379).

125504443421 is an equidigital number, since it uses as much as digits as its factorization.

125504443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91011403.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 125504443421 its reverse (124344405521), we get a palindrome (249848848942).

The spelling of 125504443421 in words is "one hundred twenty-five billion, five hundred four million, four hundred forty-three thousand, four hundred twenty-one".