1493221 has 2 divisors, whose sum is σ = 1493222. Its totient is φ = 1493220.

The previous prime is 1493213. The next prime is 1493249. The reversal of 1493221 is 1223941.

1493221 is nontrivially palindromic in base 4.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 261121 = 1110^2 + 511^2 .

It is an emirp because it is prime and its reverse (1223941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1493221 - 2³ = 1493213 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1493192 and 1493201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746610 + 746611.

It is an arithmetic number, because the mean of its divisors is an integer number (746611).

2^1493221 is an apocalyptic number.

It is an amenable number.

1493221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493221 is an equidigital number, since it uses as much as digits as its factorization.

1493221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 1493221 is about 1221.9742223140. The cubic root of 1493221 is about 114.2987189814.

The spelling of 1493221 in words is "one million, four hundred ninety-three thousand, two hundred twenty-one".