146132821 has 8 divisors (see below), whose sum is σ = 147040344. Its totient is φ = 145228800.

The previous prime is 146132809. The next prime is 146132891. The reversal of 146132821 is 128231641.

It can be written as a sum of positive squares in 4 ways, for example, as 106316721 + 39816100 = 10311^2 + 6310^2 .

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 146132821 - 2⁹ = 146132309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 146132821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146132801) 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, 149085 + ... + 150061.

It is an arithmetic number, because the mean of its divisors is an integer number (18380043).

Almost surely, 2^146132821 is an apocalyptic number.

It is an amenable number.

146132821 is a deficient number, since it is larger than the sum of its proper divisors (907523).

146132821 is an equidigital number, since it uses as much as digits as its factorization.

146132821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751.

The product of its digits is 2304, while the sum is 28.

The square root of 146132821 is about 12088.5408962372. The cubic root of 146132821 is about 526.7233718698.

The spelling of 146132821 in words is "one hundred forty-six million, one hundred thirty-two thousand, eight hundred twenty-one".