146330521 has 4 divisors (see below), whose sum is σ = 148729444. Its totient is φ = 143931600.

The previous prime is 146330501. The next prime is 146330539. The reversal of 146330521 is 125033641.

146330521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 24890121 + 121440400 = 4989^2 + 11020^2 .

It is a cyclic number.

It is not a de Polignac number, because 146330521 - 2¹¹ = 146328473 is a prime.

It is a super-2 number, since 2×146330521² = 42825242752262882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146330501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199370 + ... + 1199491.

It is an arithmetic number, because the mean of its divisors is an integer number (37182361).

Almost surely, 2^146330521 is an apocalyptic number.

It is an amenable number.

146330521 is a deficient number, since it is larger than the sum of its proper divisors (2398923).

146330521 is an equidigital number, since it uses as much as digits as its factorization.

146330521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398922.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 146330521 is about 12096.7152979642. The cubic root of 146330521 is about 526.9607957999.

The spelling of 146330521 in words is "one hundred forty-six million, three hundred thirty thousand, five hundred twenty-one".