1201343420 has 24 divisors (see below), whose sum is σ = 2671223184. Its totient is φ = 452270336.

The previous prime is 1201343413. The next prime is 1201343431. The reversal of 1201343420 is 243431021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1201343392 and 1201343401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1766342 + ... + 1767021.

It is an arithmetic number, because the mean of its divisors is an integer number (111300966).

Almost surely, 2^1201343420 is an apocalyptic number.

1201343420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201343420 is an abundant number, since it is smaller than the sum of its proper divisors (1469879764).

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

1201343420 is a wasteful number, since it uses less digits than its factorization.

1201343420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533389 (or 3533387 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1201343420 is about 34660.4013248549. The cubic root of 1201343420 is about 1063.0549759511.

Adding to 1201343420 its reverse (243431021), we get a palindrome (1444774441).

The spelling of 1201343420 in words is "one billion, two hundred one million, three hundred forty-three thousand, four hundred twenty".