4545891 has 24 divisors (see below), whose sum is σ = 7637760. Its totient is φ = 2551536.

The previous prime is 4545889. The next prime is 4545899. The reversal of 4545891 is 1985454.

It is not a de Polignac number, because 4545891 - 2¹ = 4545889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4545899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3106 + ... + 4328.

It is an arithmetic number, because the mean of its divisors is an integer number (318240).

Almost surely, 2^4545891 is an apocalyptic number.

4545891 is a deficient number, since it is larger than the sum of its proper divisors (3091869).

4545891 is a wasteful number, since it uses less digits than its factorization.

4545891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295 (or 1292 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 4545891 is about 2132.1095187630. The cubic root of 4545891 is about 165.6556829828.

The spelling of 4545891 in words is "four million, five hundred forty-five thousand, eight hundred ninety-one".