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13706281 = 471931511
BaseRepresentation
bin110100010010…
…010000101001
3221210100111001
4310102100221
512002100111
61205435001
7224334001
oct64222051
927710431
1013706281
117811806
12470ba61
132abb834
141b6b001
15130b1c1
hexd12429

13706281 has 8 divisors (see below), whose sum is σ = 14079744. Its totient is φ = 13336320.

The previous prime is 13706279. The next prime is 13706291. The reversal of 13706281 is 18260731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13706281 - 21 = 13706279 is a prime.

It is a super-2 number, since 2×137062812 = 375724277701922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13706291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8316 + ... + 9826.

It is an arithmetic number, because the mean of its divisors is an integer number (1759968).

Almost surely, 213706281 is an apocalyptic number.

It is an amenable number.

13706281 is a deficient number, since it is larger than the sum of its proper divisors (373463).

13706281 is a wasteful number, since it uses less digits than its factorization.

13706281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 13706281 is about 3702.1994813894. The cubic root of 13706281 is about 239.3168128629.

The spelling of 13706281 in words is "thirteen million, seven hundred six thousand, two hundred eighty-one".

Divisors: 1 47 193 1511 9071 71017 291623 13706281