125043821 has 8 divisors (see below), whose sum is σ = 143147520. Its totient is φ = 107000208.

The previous prime is 125043811. The next prime is 125043827. The reversal of 125043821 is 128340521.

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

It is not a de Polignac number, because 125043821 - 2¹⁴ = 125027437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125043827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10466 + ... + 18963.

It is an arithmetic number, because the mean of its divisors is an integer number (17893440).

Almost surely, 2^125043821 is an apocalyptic number.

It is an amenable number.

125043821 is a deficient number, since it is larger than the sum of its proper divisors (18103699).

125043821 is an equidigital number, since it uses as much as digits as its factorization.

125043821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30043.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 125043821 is about 11182.2994504708. The cubic root of 125043821 is about 500.0584211737.

The spelling of 125043821 in words is "one hundred twenty-five million, forty-three thousand, eight hundred twenty-one".