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14897281 = 72128183
BaseRepresentation
bin111000110101…
…000010000001
31001000212020011
4320311002001
512303203111
61251144521
7240424210
oct70650201
931025204
1014897281
118455603
124ba5141
133117979
141d9b077
151494021
hexe35081

14897281 has 4 divisors (see below), whose sum is σ = 17025472. Its totient is φ = 12769092.

The previous prime is 14897263. The next prime is 14897299. The reversal of 14897281 is 18279841.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18279841 = 101917939.

It is an interprime number because it is at equal distance from previous prime (14897263) and next prime (14897299).

It is not a de Polignac number, because 14897281 - 211 = 14895233 is a prime.

It is a super-2 number, since 2×148972812 = 443857962385922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14897251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064085 + ... + 1064098.

It is an arithmetic number, because the mean of its divisors is an integer number (4256368).

Almost surely, 214897281 is an apocalyptic number.

It is an amenable number.

14897281 is a deficient number, since it is larger than the sum of its proper divisors (2128191).

14897281 is an equidigital number, since it uses as much as digits as its factorization.

14897281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128190.

The product of its digits is 32256, while the sum is 40.

The square root of 14897281 is about 3859.6995997098. The cubic root of 14897281 is about 246.0569689815.

The spelling of 14897281 in words is "fourteen million, eight hundred ninety-seven thousand, two hundred eighty-one".

Divisors: 1 7 2128183 14897281