4111581 has 16 divisors (see below), whose sum is σ = 5883840. Its totient is φ = 2545920.

The previous prime is 4111577. The next prime is 4111621. The reversal of 4111581 is 1851114.

It is a happy number.

It is not a de Polignac number, because 4111581 - 2² = 4111577 is a prime.

It is a super-2 number, since 2×4111581² = 33810196639122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4161581) 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, 2341 + ... + 3701.

It is an arithmetic number, because the mean of its divisors is an integer number (367740).

Almost surely, 2^4111581 is an apocalyptic number.

It is an amenable number.

4111581 is a deficient number, since it is larger than the sum of its proper divisors (1772259).

4111581 is a wasteful number, since it uses less digits than its factorization.

4111581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436.

The product of its digits is 160, while the sum is 21.

The square root of 4111581 is about 2027.7033806748. The cubic root of 4111581 is about 160.2026209007.

Adding to 4111581 its reverse (1851114), we get a palindrome (5962695).

The spelling of 4111581 in words is "four million, one hundred eleven thousand, five hundred eighty-one".