1343221420 has 48 divisors (see below), whose sum is σ = 2922998400. Its totient is φ = 517879040.

The previous prime is 1343221393. The next prime is 1343221421. The reversal of 1343221420 is 241223431.

It is a junction number, because it is equal to n+sod(n) for n = 1343221391 and 1343221400.

It is not an unprimeable number, because it can be changed into a prime (1343221421) 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, 415410 + ... + 418630.

It is an arithmetic number, because the mean of its divisors is an integer number (60895800).

Almost surely, 2^1343221420 is an apocalyptic number.

1343221420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1343221420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1461499200).

1343221420 is an abundant number, since it is smaller than the sum of its proper divisors (1579776980).

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

1343221420 is a wasteful number, since it uses less digits than its factorization.

1343221420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978 (or 3976 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1343221420 is about 36649.9852660271. The cubic root of 1343221420 is about 1103.3565298673.

Adding to 1343221420 its reverse (241223431), we get a palindrome (1584444851).

The spelling of 1343221420 in words is "one billion, three hundred forty-three million, two hundred twenty-one thousand, four hundred twenty".