1321340 has 12 divisors (see below), whose sum is σ = 2774856. Its totient is φ = 528528.

The previous prime is 1321319. The next prime is 1321349. The reversal of 1321340 is 431231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33014 + ... + 33053.

It is an arithmetic number, because the mean of its divisors is an integer number (231238).

2^1321340 is an apocalyptic number.

1321340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321340 is an abundant number, since it is smaller than the sum of its proper divisors (1453516).

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

1321340 is a wasteful number, since it uses less digits than its factorization.

1321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66076 (or 66074 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1321340 is about 1149.4955415312. The cubic root of 1321340 is about 109.7332378930.

Adding to 1321340 its reverse (431231), we get a palindrome (1752571).

It can be divided in two parts, 1321 and 340, that added together give a palindrome (1661).

The spelling of 1321340 in words is "one million, three hundred twenty-one thousand, three hundred forty".