146559821 has 2 divisors, whose sum is σ = 146559822. Its totient is φ = 146559820.

The previous prime is 146559811. The next prime is 146559859. The reversal of 146559821 is 128955641.

146559821 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., 137475625 + 9084196 = 11725^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 146559821 - 2¹⁸ = 146297677 is a prime.

It is a super-3 number, since 3×146559821³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146559811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73279910 + 73279911.

It is an arithmetic number, because the mean of its divisors is an integer number (73279911).

Almost surely, 2^146559821 is an apocalyptic number.

It is an amenable number.

146559821 is a deficient number, since it is larger than the sum of its proper divisors (1).

146559821 is an equidigital number, since it uses as much as digits as its factorization.

146559821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 41.

The square root of 146559821 is about 12106.1893674269. The cubic root of 146559821 is about 527.2359014303.

The spelling of 146559821 in words is "one hundred forty-six million, five hundred fifty-nine thousand, eight hundred twenty-one".