4545921 has 16 divisors (see below), whose sum is σ = 6431040. Its totient is φ = 2848320.

The previous prime is 4545913. The next prime is 4545923. The reversal of 4545921 is 1295454.

It is not a de Polignac number, because 4545921 - 2³ = 4545913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4545923) 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, 9631 + ... + 10091.

It is an arithmetic number, because the mean of its divisors is an integer number (401940).

Almost surely, 2^4545921 is an apocalyptic number.

It is an amenable number.

4545921 is a deficient number, since it is larger than the sum of its proper divisors (1885119).

4545921 is a wasteful number, since it uses less digits than its factorization.

4545921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656.

The product of its digits is 7200, while the sum is 30.

The square root of 4545921 is about 2132.1165540373. The cubic root of 4545921 is about 165.6560473895.

The spelling of 4545921 in words is "four million, five hundred forty-five thousand, nine hundred twenty-one".