4421491 has 2 divisors, whose sum is σ = 4421492. Its totient is φ = 4421490.

The previous prime is 4421467. The next prime is 4421507. The reversal of 4421491 is 1941244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4421491 - 2¹⁹ = 3897203 is a prime.

4421491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4424491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210745 + 2210746.

It is an arithmetic number, because the mean of its divisors is an integer number (2210746).

Almost surely, 2^4421491 is an apocalyptic number.

4421491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421491 is an equidigital number, since it uses as much as digits as its factorization.

4421491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 4421491 is about 2102.7341724526. The cubic root of 4421491 is about 164.1306093204.

The spelling of 4421491 in words is "four million, four hundred twenty-one thousand, four hundred ninety-one".