455556121 has 2 divisors, whose sum is σ = 455556122. Its totient is φ = 455556120.

The previous prime is 455556119. The next prime is 455556131. The reversal of 455556121 is 121655554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339886096 + 115670025 = 18436^2 + 10755^2 .

It is a cyclic number.

It is not a de Polignac number, because 455556121 - 2¹ = 455556119 is a prime.

Together with 455556119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (455556131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227778060 + 227778061.

It is an arithmetic number, because the mean of its divisors is an integer number (227778061).

Almost surely, 2^455556121 is an apocalyptic number.

It is an amenable number.

455556121 is a deficient number, since it is larger than the sum of its proper divisors (1).

455556121 is an equidigital number, since it uses as much as digits as its factorization.

455556121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 34.

The square root of 455556121 is about 21343.7607042433. The cubic root of 455556121 is about 769.4503982699.

The spelling of 455556121 in words is "four hundred fifty-five million, five hundred fifty-six thousand, one hundred twenty-one".