4520134921 has 2 divisors, whose sum is σ = 4520134922. Its totient is φ = 4520134920.

The previous prime is 4520134897. The next prime is 4520134939. The reversal of 4520134921 is 1294310254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3175886025 + 1344248896 = 56355^2 + 36664^2 .

It is a cyclic number.

It is not a de Polignac number, because 4520134921 - 2¹⁷ = 4520003849 is a prime.

It is not a weakly prime, because it can be changed into another prime (4520134951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2260067460 + 2260067461.

It is an arithmetic number, because the mean of its divisors is an integer number (2260067461).

Almost surely, 2^4520134921 is an apocalyptic number.

It is an amenable number.

4520134921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4520134921 is an equidigital number, since it uses as much as digits as its factorization.

4520134921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 4520134921 is about 67231.9486628195. The cubic root of 4520134921 is about 1653.4223329928.

The spelling of 4520134921 in words is "four billion, five hundred twenty million, one hundred thirty-four thousand, nine hundred twenty-one".