1213105465 has 96 divisors (see below), whose sum is σ = 1875823488. Its totient is φ = 745113600.

The previous prime is 1213105463. The next prime is 1213105489. The reversal of 1213105465 is 5645013121.

It is not a de Polignac number, because 1213105465 - 2¹ = 1213105463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213105463) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 5749210 + ... + 5749420.

It is an arithmetic number, because the mean of its divisors is an integer number (19539828).

Almost surely, 2^1213105465 is an apocalyptic number.

It is an amenable number.

1213105465 is a deficient number, since it is larger than the sum of its proper divisors (662718023).

1213105465 is a wasteful number, since it uses less digits than its factorization.

1213105465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1213105465 is about 34829.6635786222. The cubic root of 1213105465 is about 1066.5130806970.

Adding to 1213105465 its reverse (5645013121), we get a palindrome (6858118586).

The spelling of 1213105465 in words is "one billion, two hundred thirteen million, one hundred five thousand, four hundred sixty-five".