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12470855 = 52494171
BaseRepresentation
bin101111100100…
…101001000111
3212110120210112
4233210221013
511143031410
61123143235
7211000115
oct57445107
925416715
1012470855
1170485a1
124214b1b
132778407
141928ab5
151165105
hexbe4a47

12470855 has 4 divisors (see below), whose sum is σ = 14965032. Its totient is φ = 9976680.

The previous prime is 12470851. The next prime is 12470867. The reversal of 12470855 is 55807421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55807421 = 431297847.

It is not a de Polignac number, because 12470855 - 22 = 12470851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12470851) 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, 1247081 + ... + 1247090.

It is an arithmetic number, because the mean of its divisors is an integer number (3741258).

Almost surely, 212470855 is an apocalyptic number.

12470855 is a deficient number, since it is larger than the sum of its proper divisors (2494177).

12470855 is an equidigital number, since it uses as much as digits as its factorization.

12470855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494176.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 12470855 is about 3531.4097751465. The cubic root of 12470855 is about 231.8989291715.

The spelling of 12470855 in words is "twelve million, four hundred seventy thousand, eight hundred fifty-five".

Divisors: 1 5 2494171 12470855