1602221 has 4 divisors (see below), whose sum is σ = 1657500. Its totient is φ = 1546944.

The previous prime is 1602193. The next prime is 1602241. The reversal of 1602221 is 1222061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222061 = 19 ⋅64319.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 624100 = 989^2 + 790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1602221 is a prime.

It is a super-2 number, since 2×1602221² = 5134224265682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1602196 and 1602205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1602241) 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 in 3 ways as a sum of consecutive naturals, for example, 27596 + ... + 27653.

It is an arithmetic number, because the mean of its divisors is an integer number (414375).

2^1602221 is an apocalyptic number.

It is an amenable number.

1602221 is a deficient number, since it is larger than the sum of its proper divisors (55279).

1602221 is an equidigital number, since it uses as much as digits as its factorization.

1602221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55278.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1602221 is about 1265.7886869458. The cubic root of 1602221 is about 117.0148032016.

Adding to 1602221 its reverse (1222061), we get a palindrome (2824282).

The spelling of 1602221 in words is "one million, six hundred two thousand, two hundred twenty-one".