45454021 has 2 divisors, whose sum is σ = 45454022. Its totient is φ = 45454020.

The previous prime is 45454001. The next prime is 45454069. The reversal of 45454021 is 12045454.

It is a happy number.

45454021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31203396 + 14250625 = 5586^2 + 3775^2 .

It is a cyclic number.

It is not a de Polignac number, because 45454021 - 2²¹ = 43356869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45454001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22727010 + 22727011.

It is an arithmetic number, because the mean of its divisors is an integer number (22727011).

Almost surely, 2^45454021 is an apocalyptic number.

It is an amenable number.

45454021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45454021 is an equidigital number, since it uses as much as digits as its factorization.

45454021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 45454021 is about 6741.9597299302. The cubic root of 45454021 is about 356.8815551748.

Adding to 45454021 its reverse (12045454), we get a palindrome (57499475).

The spelling of 45454021 in words is "forty-five million, four hundred fifty-four thousand, twenty-one".