1213603056 has 60 divisors (see below), whose sum is σ = 3439427680. Its totient is φ = 399409920.

The previous prime is 1213603033. The next prime is 1213603081. The reversal of 1213603056 is 6503063121.

1213603056 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 603 + 0 + 56 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41965 + ... + 64716.

Almost surely, 2^1213603056 is an apocalyptic number.

1213603056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1213603056 is an abundant number, since it is smaller than the sum of its proper divisors (2225824624).

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

1213603056 is a wasteful number, since it uses less digits than its factorization.

1213603056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106774 (or 106765 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1213603056 is about 34836.8060533683. The cubic root of 1213603056 is about 1066.6588813668.

Adding to 1213603056 its reverse (6503063121), we get a palindrome (7716666177).

The spelling of 1213603056 in words is "one billion, two hundred thirteen million, six hundred three thousand, fifty-six".