13215465 has 12 divisors (see below), whose sum is σ = 22906884. Its totient is φ = 7048224.

The previous prime is 13215457. The next prime is 13215473. The reversal of 13215465 is 56451231.

It is an interprime number because it is at equal distance from previous prime (13215457) and next prime (13215473).

It can be written as a sum of positive squares in 2 ways, for example, as 6230016 + 6985449 = 2496^2 + 2643^2 .

It is not a de Polignac number, because 13215465 - 2³ = 13215457 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 146794 + ... + 146883.

It is an arithmetic number, because the mean of its divisors is an integer number (1908907).

Almost surely, 2^13215465 is an apocalyptic number.

13215465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13215465 is a deficient number, since it is larger than the sum of its proper divisors (9691419).

13215465 is a wasteful number, since it uses less digits than its factorization.

13215465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293688 (or 293685 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 13215465 is about 3635.3081024860. The cubic root of 13215465 is about 236.4254093296.

Adding to 13215465 its reverse (56451231), we get a palindrome (69666696).

It can be divided in two parts, 1321 and 5465, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 13215465 in words is "thirteen million, two hundred fifteen thousand, four hundred sixty-five".