1213326445 has 8 divisors (see below), whose sum is σ = 1480669920. Its totient is φ = 954209040.

The previous prime is 1213326437. The next prime is 1213326449. The reversal of 1213326445 is 5446233121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213326445 - 2³ = 1213326437 is a prime.

It is a super-2 number, since 2×1213326445² = 2944322124272676050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213326449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056191 + ... + 2056780.

It is an arithmetic number, because the mean of its divisors is an integer number (185083740).

Almost surely, 2^1213326445 is an apocalyptic number.

It is an amenable number.

1213326445 is a deficient number, since it is larger than the sum of its proper divisors (267343475).

1213326445 is an equidigital number, since it uses as much as digits as its factorization.

1213326445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113035.

The product of its digits is 17280, while the sum is 31.

The square root of 1213326445 is about 34832.8357300981. The cubic root of 1213326445 is about 1066.5778356471.

Adding to 1213326445 its reverse (5446233121), we get a palindrome (6659559566).

The spelling of 1213326445 in words is "one billion, two hundred thirteen million, three hundred twenty-six thousand, four hundred forty-five".