1213326465 has 64 divisors (see below), whose sum is σ = 2220970752. Its totient is φ = 560332800.

The previous prime is 1213326461. The next prime is 1213326467. The reversal of 1213326465 is 5646233121.

It is not a de Polignac number, because 1213326465 - 2² = 1213326461 is a prime.

It is a super-2 number, since 2×1213326465² = 2944322221338792450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213326461) 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 63 ways as a sum of consecutive naturals, for example, 1892545 + ... + 1893185.

It is an arithmetic number, because the mean of its divisors is an integer number (34702668).

Almost surely, 2^1213326465 is an apocalyptic number.

1213326465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213326465 is a deficient number, since it is larger than the sum of its proper divisors (1007644287).

1213326465 is a wasteful number, since it uses less digits than its factorization.

1213326465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250.

The product of its digits is 25920, while the sum is 33.

The square root of 1213326465 is about 34832.8360171836. The cubic root of 1213326465 is about 1066.5778415075.

Adding to 1213326465 its reverse (5646233121), we get a palindrome (6859559586).

The spelling of 1213326465 in words is "one billion, two hundred thirteen million, three hundred twenty-six thousand, four hundred sixty-five".