444057121 has 4 divisors (see below), whose sum is σ = 444576132. Its totient is φ = 443538112.

The previous prime is 444057079. The next prime is 444057137. The reversal of 444057121 is 121750444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220225600 + 223831521 = 14840^2 + 14961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444057121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444057121.

It is not an unprimeable number, because it can be changed into a prime (444057821) 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, 258220 + ... + 259933.

It is an arithmetic number, because the mean of its divisors is an integer number (111144033).

Almost surely, 2^444057121 is an apocalyptic number.

It is an amenable number.

444057121 is a deficient number, since it is larger than the sum of its proper divisors (519011).

444057121 is an equidigital number, since it uses as much as digits as its factorization.

444057121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519010.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 444057121 is about 21072.6628834611. The cubic root of 444057121 is about 762.9210766075.

The spelling of 444057121 in words is "four hundred forty-four million, fifty-seven thousand, one hundred twenty-one".