4457991 has 8 divisors (see below), whose sum is σ = 5998960. Its totient is φ = 2944512.

The previous prime is 4457987. The next prime is 4458001. The reversal of 4457991 is 1997544.

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

It is not a de Polignac number, because 4457991 - 2² = 4457987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4457911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6490 + ... + 7143.

It is an arithmetic number, because the mean of its divisors is an integer number (749870).

Almost surely, 2^4457991 is an apocalyptic number.

4457991 is a deficient number, since it is larger than the sum of its proper divisors (1540969).

4457991 is a wasteful number, since it uses less digits than its factorization.

4457991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13745.

The product of its digits is 45360, while the sum is 39.

The square root of 4457991 is about 2111.3955100833. The cubic root of 4457991 is about 164.5810122552.

The spelling of 4457991 in words is "four million, four hundred fifty-seven thousand, nine hundred ninety-one".