445242641 has 2 divisors, whose sum is σ = 445242642. Its totient is φ = 445242640.

The previous prime is 445242557. The next prime is 445242647. The reversal of 445242641 is 146242544.

445242641 = 14920² + 14921².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222636241 + 222606400 = 14921^2 + 14920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445242641 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 445242598 and 445242607.

It is not a weakly prime, because it can be changed into another prime (445242647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222621320 + 222621321.

It is an arithmetic number, because the mean of its divisors is an integer number (222621321).

Almost surely, 2^445242641 is an apocalyptic number.

445242641 is the 14921-st centered square number.

It is an amenable number.

445242641 is a deficient number, since it is larger than the sum of its proper divisors (1).

445242641 is an equidigital number, since it uses as much as digits as its factorization.

445242641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 32.

The square root of 445242641 is about 21100.7734692357. The cubic root of 445242641 is about 763.5994086300.

The spelling of 445242641 in words is "four hundred forty-five million, two hundred forty-two thousand, six hundred forty-one".