13506256 has 10 divisors (see below), whose sum is σ = 26168402. Its totient is φ = 6753120.

The previous prime is 13506217. The next prime is 13506277. The reversal of 13506256 is 65260531.

It can be written as a sum of positive squares in only one way, i.e., 9096256 + 4410000 = 3016^2 + 2100^2 .

It is a super-2 number, since 2×13506256² = 364837902275072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 422055 + ... + 422086.

Almost surely, 2^13506256 is an apocalyptic number.

13506256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13506256 is a deficient number, since it is larger than the sum of its proper divisors (12662146).

13506256 is an equidigital number, since it uses as much as digits as its factorization.

13506256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844149 (or 844143 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 13506256 is about 3675.0858493374. The cubic root of 13506256 is about 238.1469327855.

Adding to 13506256 its reverse (65260531), we get a palindrome (78766787).

The spelling of 13506256 in words is "thirteen million, five hundred six thousand, two hundred fifty-six".