1213305400 has 24 divisors (see below), whose sum is σ = 2820935520. Its totient is φ = 485322080.

The previous prime is 1213305377. The next prime is 1213305409. The reversal of 1213305400 is 45033121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213305409) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3033064 + ... + 3033463.

It is an arithmetic number, because the mean of its divisors is an integer number (117538980).

Almost surely, 2^1213305400 is an apocalyptic number.

1213305400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213305400 is an abundant number, since it is smaller than the sum of its proper divisors (1607630120).

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

1213305400 is a wasteful number, since it uses less digits than its factorization.

1213305400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066543 (or 6066534 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1213305400 is about 34832.5336431331. The cubic root of 1213305400 is about 1066.5716690571.

Adding to 1213305400 its reverse (45033121), we get a palindrome (1258338521).

The spelling of 1213305400 in words is "one billion, two hundred thirteen million, three hundred five thousand, four hundred".