146516561 has 2 divisors, whose sum is σ = 146516562. Its totient is φ = 146516560.

The previous prime is 146516551. The next prime is 146516567. The reversal of 146516561 is 165615641.

146516561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101626561 + 44890000 = 10081^2 + 6700^2 .

It is an emirp because it is prime and its reverse (165615641) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146516561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (146516567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73258280 + 73258281.

It is an arithmetic number, because the mean of its divisors is an integer number (73258281).

Almost surely, 2^146516561 is an apocalyptic number.

It is an amenable number.

146516561 is a deficient number, since it is larger than the sum of its proper divisors (1).

146516561 is an equidigital number, since it uses as much as digits as its factorization.

146516561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 35.

The square root of 146516561 is about 12104.4025461813. The cubic root of 146516561 is about 527.1840216600.

It can be divided in two parts, 14651 and 6561, that added together give a palindrome (21212).

The spelling of 146516561 in words is "one hundred forty-six million, five hundred sixteen thousand, five hundred sixty-one".