4391051 has 4 divisors (see below), whose sum is σ = 5018352. Its totient is φ = 3763752.

The previous prime is 4391041. The next prime is 4391063. The reversal of 4391051 is 1501934.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4391051 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4391011) 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 3 ways as a sum of consecutive naturals, for example, 313640 + ... + 313653.

It is an arithmetic number, because the mean of its divisors is an integer number (1254588).

Almost surely, 2^4391051 is an apocalyptic number.

4391051 is a deficient number, since it is larger than the sum of its proper divisors (627301).

4391051 is an equidigital number, since it uses as much as digits as its factorization.

4391051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627300.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 4391051 is about 2095.4834764321. The cubic root of 4391051 is about 163.7530862033.

Adding to 4391051 its reverse (1501934), we get a palindrome (5892985).

It can be divided in two parts, 43 and 91051, that multiplied together give a palindrome (3915193).

The spelling of 4391051 in words is "four million, three hundred ninety-one thousand, fifty-one".