1213412420 has 48 divisors (see below), whose sum is σ = 2782721088. Its totient is φ = 440780160.

The previous prime is 1213412413. The next prime is 1213412443. The reversal of 1213412420 is 242143121.

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 = 1213412392 and 1213412401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264587 + ... + 269133.

It is an arithmetic number, because the mean of its divisors is an integer number (57973356).

Almost surely, 2^1213412420 is an apocalyptic number.

1213412420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213412420 is an abundant number, since it is smaller than the sum of its proper divisors (1569308668).

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

1213412420 is a wasteful number, since it uses less digits than its factorization.

1213412420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780 (or 5778 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1213412420 is about 34834.0698167756. The cubic root of 1213412420 is about 1066.6030272362.

Adding to 1213412420 its reverse (242143121), we get a palindrome (1455555541).

The spelling of 1213412420 in words is "one billion, two hundred thirteen million, four hundred twelve thousand, four hundred twenty".