1393221 has 16 divisors (see below), whose sum is σ = 1951488. Its totient is φ = 883200.
The previous prime is 1393219. The next prime is 1393229. The reversal of 1393221 is 1223931.
It is a happy number.
It is not a de Polignac number, because 1393221 - 21 = 1393219 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1393229) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5661 + ... + 5901.
It is an arithmetic number, because the mean of its divisors is an integer number (121968).
21393221 is an apocalyptic number.
It is an amenable number.
1393221 is a deficient number, since it is larger than the sum of its proper divisors (558267).
1393221 is a wasteful number, since it uses less digits than its factorization.
1393221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 332.
The product of its digits is 324, while the sum is 21.
The square root of 1393221 is about 1180.3478300908. The cubic root of 1393221 is about 111.6880402641.
The spelling of 1393221 in words is "one million, three hundred ninety-three thousand, two hundred twenty-one".
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