146067521 has 4 divisors (see below), whose sum is σ = 147407700. Its totient is φ = 144727344.

The previous prime is 146067473. The next prime is 146067557. The reversal of 146067521 is 125760641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125760641 = 587 ⋅214243.

It can be written as a sum of positive squares in 2 ways, for example, as 74580496 + 71487025 = 8636^2 + 8455^2 .

It is a cyclic number.

It is not a de Polignac number, because 146067521 - 2¹⁸ = 145805377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146067121) 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, 669926 + ... + 670143.

It is an arithmetic number, because the mean of its divisors is an integer number (36851925).

Almost surely, 2^146067521 is an apocalyptic number.

It is an amenable number.

146067521 is a deficient number, since it is larger than the sum of its proper divisors (1340179).

146067521 is a wasteful number, since it uses less digits than its factorization.

146067521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340178.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 146067521 is about 12085.8396894879. The cubic root of 146067521 is about 526.6449040750.

The spelling of 146067521 in words is "one hundred forty-six million, sixty-seven thousand, five hundred twenty-one".