146109521 has 4 divisors (see below), whose sum is σ = 146491392. Its totient is φ = 145727652.

The previous prime is 146109503. The next prime is 146109599. The reversal of 146109521 is 125901641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146109521 - 2¹⁰ = 146108497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (146109121) 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, 190361 + ... + 191126.

It is an arithmetic number, because the mean of its divisors is an integer number (36622848).

Almost surely, 2^146109521 is an apocalyptic number.

It is an amenable number.

146109521 is a deficient number, since it is larger than the sum of its proper divisors (381871).

146109521 is an equidigital number, since it uses as much as digits as its factorization.

146109521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381870.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 146109521 is about 12087.5771352244. The cubic root of 146109521 is about 526.6953760899.

The spelling of 146109521 in words is "one hundred forty-six million, one hundred nine thousand, five hundred twenty-one".