1213332445 has 16 divisors (see below), whose sum is σ = 1597588272. Its totient is φ = 879091200.

The previous prime is 1213332437. The next prime is 1213332451. The reversal of 1213332445 is 5442333121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 173527929 + 1039804516 = 13173^2 + 32246^2 .

It is not a de Polignac number, because 1213332445 - 2³ = 1213332437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172656 + ... + 179545.

It is an arithmetic number, because the mean of its divisors is an integer number (99849267).

Almost surely, 2^1213332445 is an apocalyptic number.

It is an amenable number.

1213332445 is a deficient number, since it is larger than the sum of its proper divisors (384255827).

1213332445 is a wasteful number, since it uses less digits than its factorization.

1213332445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352272.

The product of its digits is 8640, while the sum is 28.

The square root of 1213332445 is about 34832.9218556239. The cubic root of 1213332445 is about 1066.5795937496.

Adding to 1213332445 its reverse (5442333121), we get a palindrome (6655665566).

The spelling of 1213332445 in words is "one billion, two hundred thirteen million, three hundred thirty-two thousand, four hundred forty-five".