4431641 has 2 divisors, whose sum is σ = 4431642. Its totient is φ = 4431640.

The previous prime is 4431587. The next prime is 4431643. The reversal of 4431641 is 1461344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3254416 + 1177225 = 1804^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431641 - 2¹⁸ = 4169497 is a prime.

Together with 4431643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4431643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215820 + 2215821.

It is an arithmetic number, because the mean of its divisors is an integer number (2215821).

Almost surely, 2^4431641 is an apocalyptic number.

It is an amenable number.

4431641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431641 is an equidigital number, since it uses as much as digits as its factorization.

4431641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 4431641 is about 2105.1463132049. The cubic root of 4431641 is about 164.2561063936.

Adding to 4431641 its reverse (1461344), we get a palindrome (5892985).

The spelling of 4431641 in words is "four million, four hundred thirty-one thousand, six hundred forty-one".