146206521 has 6 divisors (see below), whose sum is σ = 211187210. Its totient is φ = 97471008.

The previous prime is 146206513. The next prime is 146206531. The reversal of 146206521 is 125602641.

146206521 is a `hidden beast` number, since 1 + 4 + 6 + 2 + 0 + 652 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 80353296 + 65853225 = 8964^2 + 8115^2 .

It is not a de Polignac number, because 146206521 - 2³ = 146206513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146206531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8122576 + ... + 8122593.

Almost surely, 2^146206521 is an apocalyptic number.

It is an amenable number.

146206521 is a deficient number, since it is larger than the sum of its proper divisors (64980689).

146206521 is a wasteful number, since it uses less digits than its factorization.

146206521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16245175 (or 16245172 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 146206521 is about 12091.5888534138. The cubic root of 146206521 is about 526.8119054565.

The spelling of 146206521 in words is "one hundred forty-six million, two hundred six thousand, five hundred twenty-one".