44640121 has 2 divisors, whose sum is σ = 44640122. Its totient is φ = 44640120.

The previous prime is 44640109. The next prime is 44640131. The reversal of 44640121 is 12104644.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36772096 + 7868025 = 6064^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 44640121 - 2⁷ = 44639993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 44640092 and 44640101.

It is not a weakly prime, because it can be changed into another prime (44640131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22320060 + 22320061.

It is an arithmetic number, because the mean of its divisors is an integer number (22320061).

Almost surely, 2^44640121 is an apocalyptic number.

It is an amenable number.

44640121 is a deficient number, since it is larger than the sum of its proper divisors (1).

44640121 is an equidigital number, since it uses as much as digits as its factorization.

44640121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 44640121 is about 6681.3262904905. The cubic root of 44640121 is about 354.7386054341.

Adding to 44640121 its reverse (12104644), we get a palindrome (56744765).

The spelling of 44640121 in words is "forty-four million, six hundred forty thousand, one hundred twenty-one".