1213034445 has 36 divisors (see below), whose sum is σ = 2445877980. Its totient is φ = 554529024.

The previous prime is 1213034441. The next prime is 1213034447. The reversal of 1213034445 is 5444303121.

It is a happy number.

1213034445 is a `hidden beast` number, since 1 + 213 + 0 + 3 + 4 + 445 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 408120804 + 804913641 = 20202^2 + 28371^2 .

It is not a de Polignac number, because 1213034445 - 2² = 1213034441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213034441) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 272860 + ... + 277269.

It is an arithmetic number, because the mean of its divisors is an integer number (67941055).

Almost surely, 2^1213034445 is an apocalyptic number.

1213034445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213034445 is an abundant number, since it is smaller than the sum of its proper divisors (1232843535).

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

1213034445 is a wasteful number, since it uses less digits than its factorization.

1213034445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550154 (or 550144 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1213034445 is about 34828.6440304529. The cubic root of 1213034445 is about 1066.4922676572.

Adding to 1213034445 its reverse (5444303121), we get a palindrome (6657337566).

The spelling of 1213034445 in words is "one billion, two hundred thirteen million, thirty-four thousand, four hundred forty-five".