421431445 has 8 divisors (see below), whose sum is σ = 535465944. Its totient is φ = 317313024.

The previous prime is 421431403. The next prime is 421431449. The reversal of 421431445 is 544134124.

421431445 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 115111441 + 306320004 = 10729^2 + 17502^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421431445 - 2²³ = 413042837 is a prime.

It is a super-3 number, since 3×421431445³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421431449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2478924 + ... + 2479093.

It is an arithmetic number, because the mean of its divisors is an integer number (66933243).

Almost surely, 2^421431445 is an apocalyptic number.

It is an amenable number.

421431445 is a deficient number, since it is larger than the sum of its proper divisors (114034499).

421431445 is a wasteful number, since it uses less digits than its factorization.

421431445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958039.

The product of its digits is 7680, while the sum is 28.

The square root of 421431445 is about 20528.7955077740. The cubic root of 421431445 is about 749.7370604204.

Adding to 421431445 its reverse (544134124), we get a palindrome (965565569).

The spelling of 421431445 in words is "four hundred twenty-one million, four hundred thirty-one thousand, four hundred forty-five".