501444121 has 8 divisors (see below), whose sum is σ = 533148264. Its totient is φ = 469985280.

The previous prime is 501444109. The next prime is 501444131. The reversal of 501444121 is 121444105.

It can be written as a sum of positive squares in 4 ways, for example, as 173290896 + 328153225 = 13164^2 + 18115^2 .

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 501444121 - 2⁵ = 501444089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 501444092 and 501444101.

It is not an unprimeable number, because it can be changed into a prime (501444131) 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, 57100 + ... + 65293.

It is an arithmetic number, because the mean of its divisors is an integer number (66643533).

Almost surely, 2^501444121 is an apocalyptic number.

It is an amenable number.

501444121 is a deficient number, since it is larger than the sum of its proper divisors (31704143).

501444121 is a wasteful number, since it uses less digits than its factorization.

501444121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122651.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 501444121 is about 22392.9480194100. The cubic root of 501444121 is about 794.4639245601.

Adding to 501444121 its reverse (121444105), we get a palindrome (622888226).

The spelling of 501444121 in words is "five hundred one million, four hundred forty-four thousand, one hundred twenty-one".