8542480721 has 2 divisors, whose sum is σ = 8542480722. Its totient is φ = 8542480720.

The previous prime is 8542480703. The next prime is 8542480741. The reversal of 8542480721 is 1270842458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8521320721 + 21160000 = 92311^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 8542480721 - 2⁶ = 8542480657 is a prime.

It is not a weakly prime, because it can be changed into another prime (8542480741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4271240360 + 4271240361.

It is an arithmetic number, because the mean of its divisors is an integer number (4271240361).

Almost surely, 2^8542480721 is an apocalyptic number.

It is an amenable number.

8542480721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8542480721 is an equidigital number, since it uses as much as digits as its factorization.

8542480721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 143360, while the sum is 41.

The square root of 8542480721 is about 92425.5414969261. The cubic root of 8542480721 is about 2044.2217391147.

The spelling of 8542480721 in words is "eight billion, five hundred forty-two million, four hundred eighty thousand, seven hundred twenty-one".