4421691 has 6 divisors (see below), whose sum is σ = 6386900. Its totient is φ = 2947788.

The previous prime is 4421689. The next prime is 4421693. The reversal of 4421691 is 1961244.

It is an interprime number because it is at equal distance from previous prime (4421689) and next prime (4421693).

It is not a de Polignac number, because 4421691 - 2¹ = 4421689 is a prime.

It is a Duffinian number.

4421691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4421693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 245641 + ... + 245658.

Almost surely, 2^4421691 is an apocalyptic number.

4421691 is a deficient number, since it is larger than the sum of its proper divisors (1965209).

4421691 is a wasteful number, since it uses less digits than its factorization.

4421691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491305 (or 491302 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 4421691 is about 2102.7817290437. The cubic root of 4421691 is about 164.1330840231.

The spelling of 4421691 in words is "four million, four hundred twenty-one thousand, six hundred ninety-one".