13147856 has 10 divisors (see below), whose sum is σ = 25474002. Its totient is φ = 6573920.

The previous prime is 13147853. The next prime is 13147859. The reversal of 13147856 is 65874131.

It is an interprime number because it is at equal distance from previous prime (13147853) and next prime (13147859).

It can be written as a sum of positive squares in only one way, i.e., 8904256 + 4243600 = 2984^2 + 2060^2 .

It is a super-2 number, since 2×13147856² = 345732234793472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13147853) 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 as a sum of consecutive naturals, namely, 410855 + ... + 410886.

Almost surely, 2^13147856 is an apocalyptic number.

13147856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13147856 is a deficient number, since it is larger than the sum of its proper divisors (12326146).

13147856 is an equidigital number, since it uses as much as digits as its factorization.

13147856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821749 (or 821743 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 13147856 is about 3625.9972421391. The cubic root of 13147856 is about 236.0215435662.

The spelling of 13147856 in words is "thirteen million, one hundred forty-seven thousand, eight hundred fifty-six".