146995821 has 24 divisors (see below), whose sum is σ = 256935744. Its totient is φ = 79056000.

The previous prime is 146995813. The next prime is 146995841. The reversal of 146995821 is 128599641.

146995821 is a `hidden beast` number, since 1 + 4 + 69 + 9 + 582 + 1 = 666.

It is not a de Polignac number, because 146995821 - 2³ = 146995813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146995841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67555 + ... + 69696.

It is an arithmetic number, because the mean of its divisors is an integer number (10705656).

Almost surely, 2^146995821 is an apocalyptic number.

It is an amenable number.

146995821 is a deficient number, since it is larger than the sum of its proper divisors (109939923).

146995821 is a wasteful number, since it uses less digits than its factorization.

146995821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137281 (or 137278 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 146995821 is about 12124.1833127019. The cubic root of 146995821 is about 527.7582075583.

The spelling of 146995821 in words is "one hundred forty-six million, nine hundred ninety-five thousand, eight hundred twenty-one".