4355991 has 8 divisors (see below), whose sum is σ = 6453360. Its totient is φ = 2903976.

The previous prime is 4355987. The next prime is 4355999. The reversal of 4355991 is 1995534.

It is not a de Polignac number, because 4355991 - 2² = 4355987 is a prime.

4355991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4355999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80640 + ... + 80693.

It is an arithmetic number, because the mean of its divisors is an integer number (806670).

Almost surely, 2^4355991 is an apocalyptic number.

4355991 is a deficient number, since it is larger than the sum of its proper divisors (2097369).

4355991 is a wasteful number, since it uses less digits than its factorization.

4355991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161342 (or 161336 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 4355991 is about 2087.1010996116. The cubic root of 4355991 is about 163.3160965660.

It can be divided in two parts, 435599 and 1, that added together give a square (435600 = 660²).

The spelling of 4355991 in words is "four million, three hundred fifty-five thousand, nine hundred ninety-one".