4405641 has 4 divisors (see below), whose sum is σ = 5874192. Its totient is φ = 2937092.

The previous prime is 4405637. The next prime is 4405679. The reversal of 4405641 is 1465044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4405641 - 2² = 4405637 is a prime.

It is a D-number.

4405641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4405691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734271 + ... + 734276.

It is an arithmetic number, because the mean of its divisors is an integer number (1468548).

Almost surely, 2^4405641 is an apocalyptic number.

4405641 is the 1328-th centered pentagonal number.

It is an amenable number.

4405641 is a deficient number, since it is larger than the sum of its proper divisors (1468551).

4405641 is a wasteful number, since it uses less digits than its factorization.

4405641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468550.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 4405641 is about 2098.9618862666. The cubic root of 4405641 is about 163.9342513562.

The spelling of 4405641 in words is "four million, four hundred five thousand, six hundred forty-one".