1320043420 has 12 divisors (see below), whose sum is σ = 2772091224. Its totient is φ = 528017360.

The previous prime is 1320043409. The next prime is 1320043423. The reversal of 1320043420 is 243400231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320043423) 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, 33001066 + ... + 33001105.

It is an arithmetic number, because the mean of its divisors is an integer number (231007602).

Almost surely, 2^1320043420 is an apocalyptic number.

1320043420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320043420 is an abundant number, since it is smaller than the sum of its proper divisors (1452047804).

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

1320043420 is a wasteful number, since it uses less digits than its factorization.

1320043420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66002180 (or 66002178 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1320043420 is about 36332.4017923396. The cubic root of 1320043420 is about 1096.9733381476.

Adding to 1320043420 its reverse (243400231), we get a palindrome (1563443651).

It can be divided in two parts, 132004 and 3420, that added together give a square (135424 = 368²).

The spelling of 1320043420 in words is "one billion, three hundred twenty million, forty-three thousand, four hundred twenty".