146531321 has 8 divisors (see below), whose sum is σ = 153049344. Its totient is φ = 140025600.

The previous prime is 146531317. The next prime is 146531353. The reversal of 146531321 is 123135641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146531321 - 2² = 146531317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146531521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28121 + ... + 32921.

It is an arithmetic number, because the mean of its divisors is an integer number (19131168).

Almost surely, 2^146531321 is an apocalyptic number.

It is an amenable number.

146531321 is a deficient number, since it is larger than the sum of its proper divisors (6518023).

146531321 is a wasteful number, since it uses less digits than its factorization.

146531321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151.

The product of its digits is 2160, while the sum is 26.

The square root of 146531321 is about 12105.0122263466. The cubic root of 146531321 is about 527.2017238110.

Adding to 146531321 its reverse (123135641), we get a palindrome (269666962).

The spelling of 146531321 in words is "one hundred forty-six million, five hundred thirty-one thousand, three hundred twenty-one".