146316521 has 4 divisors (see below), whose sum is σ = 157571652. Its totient is φ = 135061392.

The previous prime is 146316509. The next prime is 146316523. The reversal of 146316521 is 125613641.

It is a happy number.

146316521 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 54922921 + 91393600 = 7411^2 + 9560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146316521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146316523) 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, 5627546 + ... + 5627571.

It is an arithmetic number, because the mean of its divisors is an integer number (39392913).

Almost surely, 2^146316521 is an apocalyptic number.

It is an amenable number.

146316521 is a deficient number, since it is larger than the sum of its proper divisors (11255131).

146316521 is a wasteful number, since it uses less digits than its factorization.

146316521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11255130.

The product of its digits is 4320, while the sum is 29.

The square root of 146316521 is about 12096.1366146386. The cubic root of 146316521 is about 526.9439898130.

The spelling of 146316521 in words is "one hundred forty-six million, three hundred sixteen thousand, five hundred twenty-one".