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13249465 = 52649893
BaseRepresentation
bin110010100010…
…101110111001
3220221010211221
4302202232321
511342440330
61151552041
7220422115
oct62425671
926833757
1013249465
11752a579
12452b621
13298b928
141a8c745
15126ab7a
hexca2bb9

13249465 has 4 divisors (see below), whose sum is σ = 15899364. Its totient is φ = 10599568.

The previous prime is 13249463. The next prime is 13249487. The reversal of 13249465 is 56494231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56494231 = 72837757.

It can be written as a sum of positive squares in 2 ways, for example, as 2013561 + 11235904 = 1419^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 13249465 - 21 = 13249463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13249465.

It is not an unprimeable number, because it can be changed into a prime (13249463) 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 3 ways as a sum of consecutive naturals, for example, 1324942 + ... + 1324951.

It is an arithmetic number, because the mean of its divisors is an integer number (3974841).

Almost surely, 213249465 is an apocalyptic number.

It is an amenable number.

13249465 is a deficient number, since it is larger than the sum of its proper divisors (2649899).

13249465 is an equidigital number, since it uses as much as digits as its factorization.

13249465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649898.

The product of its digits is 25920, while the sum is 34.

The square root of 13249465 is about 3639.9814559967. The cubic root of 13249465 is about 236.6279896680.

The spelling of 13249465 in words is "thirteen million, two hundred forty-nine thousand, four hundred sixty-five".

Divisors: 1 5 2649893 13249465