45812561 has 2 divisors, whose sum is σ = 45812562. Its totient is φ = 45812560.

The previous prime is 45812551. The next prime is 45812633. The reversal of 45812561 is 16521854.

45812561 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., 26584336 + 19228225 = 5156^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 45812561 - 2¹⁰ = 45811537 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (45812551) 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, 22906280 + 22906281.

It is an arithmetic number, because the mean of its divisors is an integer number (22906281).

Almost surely, 2^45812561 is an apocalyptic number.

It is an amenable number.

45812561 is a deficient number, since it is larger than the sum of its proper divisors (1).

45812561 is an equidigital number, since it uses as much as digits as its factorization.

45812561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 32.

The square root of 45812561 is about 6768.4976915118. The cubic root of 45812561 is about 357.8174558062.

The spelling of 45812561 in words is "forty-five million, eight hundred twelve thousand, five hundred sixty-one".