4158991 has 4 divisors (see below), whose sum is σ = 4293184. Its totient is φ = 4024800.

The previous prime is 4158989. The next prime is 4159007. The reversal of 4158991 is 1998514.

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

It is a cyclic number.

It is not a de Polignac number, because 4158991 - 2¹ = 4158989 is a prime.

It is a super-2 number, since 2×4158991² = 34594412276162, which contains 22 as substring.

It is a Duffinian number.

4158991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4158991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4158941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67050 + ... + 67111.

It is an arithmetic number, because the mean of its divisors is an integer number (1073296).

Almost surely, 2^4158991 is an apocalyptic number.

4158991 is a deficient number, since it is larger than the sum of its proper divisors (134193).

4158991 is a wasteful number, since it uses less digits than its factorization.

4158991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134192.

The product of its digits is 12960, while the sum is 37.

The square root of 4158991 is about 2039.3604389612. The cubic root of 4158991 is about 160.8160263681.

The spelling of 4158991 in words is "four million, one hundred fifty-eight thousand, nine hundred ninety-one".