441392561 has 2 divisors, whose sum is σ = 441392562. Its totient is φ = 441392560.

The previous prime is 441392551. The next prime is 441392621. The reversal of 441392561 is 165293144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340771600 + 100620961 = 18460^2 + 10031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-441392561 is a prime.

It is a super-2 number, since 2×441392561² = 389654785812277442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (441392531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220696280 + 220696281.

It is an arithmetic number, because the mean of its divisors is an integer number (220696281).

Almost surely, 2^441392561 is an apocalyptic number.

It is an amenable number.

441392561 is a deficient number, since it is larger than the sum of its proper divisors (1).

441392561 is an equidigital number, since it uses as much as digits as its factorization.

441392561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 441392561 is about 21009.3446113866. The cubic root of 441392561 is about 761.3920476260.

The spelling of 441392561 in words is "four hundred forty-one million, three hundred ninety-two thousand, five hundred sixty-one".