445311421 has 2 divisors, whose sum is σ = 445311422. Its totient is φ = 445311420.

The previous prime is 445311401. The next prime is 445311439. The reversal of 445311421 is 124113544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274068025 + 171243396 = 16555^2 + 13086^2 .

It is a cyclic number.

It is not a de Polignac number, because 445311421 - 2²¹ = 443214269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445311401) 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 as a sum of consecutive naturals, namely, 222655710 + 222655711.

It is an arithmetic number, because the mean of its divisors is an integer number (222655711).

Almost surely, 2^445311421 is an apocalyptic number.

It is an amenable number.

445311421 is a deficient number, since it is larger than the sum of its proper divisors (1).

445311421 is an equidigital number, since it uses as much as digits as its factorization.

445311421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 445311421 is about 21102.4032043746. The cubic root of 445311421 is about 763.6387262652.

Adding to 445311421 its reverse (124113544), we get a palindrome (569424965).

The spelling of 445311421 in words is "four hundred forty-five million, three hundred eleven thousand, four hundred twenty-one".