146196821 has 8 divisors (see below), whose sum is σ = 155161944. Its totient is φ = 137272320.

The previous prime is 146196779. The next prime is 146196823. The reversal of 146196821 is 128691641.

146196821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 52900 + 146143921 = 230^2 + 12089^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146196821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146196823) 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, 2570 + ... + 17291.

It is an arithmetic number, because the mean of its divisors is an integer number (19395243).

Almost surely, 2^146196821 is an apocalyptic number.

It is an amenable number.

146196821 is a deficient number, since it is larger than the sum of its proper divisors (8965123).

146196821 is a wasteful number, since it uses less digits than its factorization.

146196821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20311.

The product of its digits is 20736, while the sum is 38.

The square root of 146196821 is about 12091.1877414917. The cubic root of 146196821 is about 526.8002548396.

The spelling of 146196821 in words is "one hundred forty-six million, one hundred ninety-six thousand, eight hundred twenty-one".