145566561 has 16 divisors (see below), whose sum is σ = 221986688. Its totient is φ = 83116800.

The previous prime is 145566539. The next prime is 145566601. The reversal of 145566561 is 165665541.

It is not a de Polignac number, because 145566561 - 2⁷ = 145566433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145566521) 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 in 15 ways as a sum of consecutive naturals, for example, 45081 + ... + 48201.

It is an arithmetic number, because the mean of its divisors is an integer number (13874168).

Almost surely, 2^145566561 is an apocalyptic number.

It is an amenable number.

145566561 is a deficient number, since it is larger than the sum of its proper divisors (76420127).

145566561 is a wasteful number, since it uses less digits than its factorization.

145566561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352.

The product of its digits is 108000, while the sum is 39.

The square root of 145566561 is about 12065.0968085631. The cubic root of 145566561 is about 526.0421458035.

The spelling of 145566561 in words is "one hundred forty-five million, five hundred sixty-six thousand, five hundred sixty-one".