1321002 has 32 divisors (see below), whose sum is σ = 3110400. Its totient is φ = 414144.

The previous prime is 1320983. The next prime is 1321007. The reversal of 1321002 is 2001231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (1321007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^1321002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1555200).

1321002 is an abundant number, since it is smaller than the sum of its proper divisors (1789398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321002 is a wasteful number, since it uses less digits than its factorization.

1321002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1321002 is about 1149.3485111140. The cubic root of 1321002 is about 109.7238804737.

Adding to 1321002 its reverse (2001231), we get a palindrome (3322233).

The spelling of 1321002 in words is "one million, three hundred twenty-one thousand, two".