4550721 has 16 divisors (see below), whose sum is σ = 6988800. Its totient is φ = 2580048.

The previous prime is 4550701. The next prime is 4550731. The reversal of 4550721 is 1270554.

It is not a de Polignac number, because 4550721 - 2⁶ = 4550657 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4550691 and 4550700.

It is not an unprimeable number, because it can be changed into a prime (4550701) 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, 2140 + ... + 3698.

It is an arithmetic number, because the mean of its divisors is an integer number (436800).

Almost surely, 2^4550721 is an apocalyptic number.

It is an amenable number.

4550721 is a deficient number, since it is larger than the sum of its proper divisors (2438079).

4550721 is a wasteful number, since it uses less digits than its factorization.

4550721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 4550721 is about 2133.2418990822. The cubic root of 4550721 is about 165.7143318258.

It can be divided in two parts, 4 and 550721, that added together give a triangular number (550725 = T₁₀₄₉).

The spelling of 4550721 in words is "four million, five hundred fifty thousand, seven hundred twenty-one".