1493821 has 8 divisors (see below), whose sum is σ = 1736640. Its totient is φ = 1258368.

The previous prime is 1493813. The next prime is 1493839. The reversal of 1493821 is 1283941.

It is a happy number.

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 1493821 - 2³ = 1493813 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 1493821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1396 + ... + 2221.

It is an arithmetic number, because the mean of its divisors is an integer number (217080).

2^1493821 is an apocalyptic number.

It is an amenable number.

1493821 is a deficient number, since it is larger than the sum of its proper divisors (242819).

1493821 is an equidigital number, since it uses as much as digits as its factorization.

1493821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683.

The product of its digits is 1728, while the sum is 28.

The square root of 1493821 is about 1222.2197020176. The cubic root of 1493821 is about 114.3140259472.

The spelling of 1493821 in words is "one million, four hundred ninety-three thousand, eight hundred twenty-one".