4491131 has 4 divisors (see below), whose sum is σ = 4518192. Its totient is φ = 4464072.

The previous prime is 4491121. The next prime is 4491133. The reversal of 4491131 is 1311944.

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 4491131 - 2²² = 296827 is a prime.

It is a super-2 number, since 2×4491131² = 40340515318322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4491097 and 4491106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491133) 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, 13280 + ... + 13613.

It is an arithmetic number, because the mean of its divisors is an integer number (1129548).

Almost surely, 2^4491131 is an apocalyptic number.

4491131 is a deficient number, since it is larger than the sum of its proper divisors (27061).

4491131 is a wasteful number, since it uses less digits than its factorization.

4491131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27060.

The product of its digits is 432, while the sum is 23.

The square root of 4491131 is about 2119.2288691880. The cubic root of 4491131 is about 164.9878289155.

The spelling of 4491131 in words is "four million, four hundred ninety-one thousand, one hundred thirty-one".