4391281 has 8 divisors (see below), whose sum is σ = 4483584. Its totient is φ = 4300080.

The previous prime is 4391263. The next prime is 4391323. The reversal of 4391281 is 1821934.

It is a happy number.

It is the 856-th star number.

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

It is a cyclic number.

It is not a de Polignac number, because 4391281 - 2⁵ = 4391249 is a prime.

It is a super-2 number, since 2×4391281² = 38566697641922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4391221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15715 + ... + 15991.

It is an arithmetic number, because the mean of its divisors is an integer number (560448).

Almost surely, 2^4391281 is an apocalyptic number.

It is an amenable number.

4391281 is a deficient number, since it is larger than the sum of its proper divisors (92303).

4391281 is a wasteful number, since it uses less digits than its factorization.

4391281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its digits is 1728, while the sum is 28.

The square root of 4391281 is about 2095.5383556499. The cubic root of 4391281 is about 163.7559452419.

The spelling of 4391281 in words is "four million, three hundred ninety-one thousand, two hundred eighty-one".