4512891 has 4 divisors (see below), whose sum is σ = 6017192. Its totient is φ = 3008592.

The previous prime is 4512877. The next prime is 4512901. The reversal of 4512891 is 1982154.

It is a happy number.

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

It is not a de Polignac number, because 4512891 - 2¹⁰ = 4511867 is a prime.

It is a D-number.

It is a Duffinian number.

4512891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4512811) 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 3 ways as a sum of consecutive naturals, for example, 752146 + ... + 752151.

It is an arithmetic number, because the mean of its divisors is an integer number (1504298).

Almost surely, 2^4512891 is an apocalyptic number.

4512891 is a deficient number, since it is larger than the sum of its proper divisors (1504301).

4512891 is a wasteful number, since it uses less digits than its factorization.

4512891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504300.

The product of its digits is 2880, while the sum is 30.

The square root of 4512891 is about 2124.3566084817. The cubic root of 4512891 is about 165.2538608290.

The spelling of 4512891 in words is "four million, five hundred twelve thousand, eight hundred ninety-one".