4115991 has 16 divisors (see below), whose sum is σ = 6150528. Its totient is φ = 2426400.

The previous prime is 4115987. The next prime is 4116019. The reversal of 4115991 is 1995114.

It is not a de Polignac number, because 4115991 - 2² = 4115987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4115971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (384408).

Almost surely, 2^4115991 is an apocalyptic number.

4115991 is a deficient number, since it is larger than the sum of its proper divisors (2034537).

4115991 is a wasteful number, since it uses less digits than its factorization.

4115991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422.

The product of its digits is 1620, while the sum is 30.

The square root of 4115991 is about 2028.7905263974. The cubic root of 4115991 is about 160.2598771498.

The spelling of 4115991 in words is "four million, one hundred fifteen thousand, nine hundred ninety-one".