455061721 has 2 divisors, whose sum is σ = 455061722. Its totient is φ = 455061720.

The previous prime is 455061713. The next prime is 455061751. The reversal of 455061721 is 127160554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378691600 + 76370121 = 19460^2 + 8739^2 .

It is a cyclic number.

It is not a de Polignac number, because 455061721 - 2³ = 455061713 is a prime.

It is not a weakly prime, because it can be changed into another prime (455061751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227530860 + 227530861.

It is an arithmetic number, because the mean of its divisors is an integer number (227530861).

Almost surely, 2^455061721 is an apocalyptic number.

It is an amenable number.

455061721 is a deficient number, since it is larger than the sum of its proper divisors (1).

455061721 is an equidigital number, since it uses as much as digits as its factorization.

455061721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 455061721 is about 21332.1757211964. The cubic root of 455061721 is about 769.1719444855.

The spelling of 455061721 in words is "four hundred fifty-five million, sixty-one thousand, seven hundred twenty-one".