146605621 has 4 divisors (see below), whose sum is σ = 146633644. Its totient is φ = 146577600.

The previous prime is 146605609. The next prime is 146605649. The reversal of 146605621 is 126506641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135140625 + 11464996 = 11625^2 + 3386^2 .

It is a cyclic number.

It is not a de Polignac number, because 146605621 - 2⁷ = 146605493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146605601) 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 3 ways as a sum of consecutive naturals, for example, 3570 + ... + 17491.

It is an arithmetic number, because the mean of its divisors is an integer number (36658411).

Almost surely, 2^146605621 is an apocalyptic number.

It is an amenable number.

146605621 is a deficient number, since it is larger than the sum of its proper divisors (28023).

146605621 is an equidigital number, since it uses as much as digits as its factorization.

146605621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28022.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 146605621 is about 12108.0808140679. The cubic root of 146605621 is about 527.2908161839.

The spelling of 146605621 in words is "one hundred forty-six million, six hundred five thousand, six hundred twenty-one".