4451391 has 12 divisors (see below), whose sum is σ = 7348432. Its totient is φ = 2543616.

The previous prime is 4451389. The next prime is 4451393. The reversal of 4451391 is 1931544.

It is an interprime number because it is at equal distance from previous prime (4451389) and next prime (4451393).

It is not a de Polignac number, because 4451391 - 2¹ = 4451389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35266 + ... + 35391.

Almost surely, 2^4451391 is an apocalyptic number.

4451391 is a deficient number, since it is larger than the sum of its proper divisors (2897041).

4451391 is a wasteful number, since it uses less digits than its factorization.

4451391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70670 (or 70667 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 4451391 is about 2109.8319838319. The cubic root of 4451391 is about 164.4997520960.

The spelling of 4451391 in words is "four million, four hundred fifty-one thousand, three hundred ninety-one".