45206561 has 4 divisors (see below), whose sum is σ = 45220032. Its totient is φ = 45193092.

The previous prime is 45206533. The next prime is 45206573. The reversal of 45206561 is 16560254.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16560254 = 2 ⋅8280127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45206561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45206521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780 + ... + 9906.

It is an arithmetic number, because the mean of its divisors is an integer number (11305008).

Almost surely, 2^45206561 is an apocalyptic number.

It is an amenable number.

45206561 is a deficient number, since it is larger than the sum of its proper divisors (13471).

45206561 is an equidigital number, since it uses as much as digits as its factorization.

45206561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13470.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 45206561 is about 6723.5824528297. The cubic root of 45206561 is about 356.2327335019.

The spelling of 45206561 in words is "forty-five million, two hundred six thousand, five hundred sixty-one".