4550921 has 2 divisors, whose sum is σ = 4550922. Its totient is φ = 4550920.

The previous prime is 4550879. The next prime is 4550927. The reversal of 4550921 is 1290554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2560000 + 1990921 = 1600^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 4550921 - 2⁶ = 4550857 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4550927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2275460 + 2275461.

It is an arithmetic number, because the mean of its divisors is an integer number (2275461).

Almost surely, 2^4550921 is an apocalyptic number.

It is an amenable number.

4550921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4550921 is an equidigital number, since it uses as much as digits as its factorization.

4550921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 4550921 is about 2133.2887755763. The cubic root of 4550921 is about 165.7167594543.

The spelling of 4550921 in words is "four million, five hundred fifty thousand, nine hundred twenty-one".