1321420 has 12 divisors (see below), whose sum is σ = 2775024. Its totient is φ = 528560.

The previous prime is 1321417. The next prime is 1321421. The reversal of 1321420 is 241231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321420.

It is not an unprimeable number, because it can be changed into a prime (1321421) 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, 33016 + ... + 33055.

It is an arithmetic number, because the mean of its divisors is an integer number (231252).

2^1321420 is an apocalyptic number.

1321420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321420 is an abundant number, since it is smaller than the sum of its proper divisors (1453604).

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

1321420 is a wasteful number, since it uses less digits than its factorization.

1321420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66080 (or 66078 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1321420 is about 1149.5303388776. The cubic root of 1321420 is about 109.7354524333.

Adding to 1321420 its reverse (241231), we get a palindrome (1562651).

The spelling of 1321420 in words is "one million, three hundred twenty-one thousand, four hundred twenty".