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12880799 = 30741957
BaseRepresentation
bin110001001000…
…101110011111
3220020102010122
4301020232133
511244141144
61140025155
7214325231
oct61105637
926212118
1012880799
1172a8598
1243921bb
13288cb99
1419d4251
1511e67ee
hexc48b9f

12880799 has 4 divisors (see below), whose sum is σ = 12923064. Its totient is φ = 12838536.

The previous prime is 12880793. The next prime is 12880811. The reversal of 12880799 is 99708821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99708821 = 372694833.

It is a cyclic number.

It is not a de Polignac number, because 12880799 - 24 = 12880783 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 (12880793) 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, 20672 + ... + 21285.

It is an arithmetic number, because the mean of its divisors is an integer number (3230766).

Almost surely, 212880799 is an apocalyptic number.

12880799 is a deficient number, since it is larger than the sum of its proper divisors (42265).

12880799 is an equidigital number, since it uses as much as digits as its factorization.

12880799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42264.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 12880799 is about 3588.9830035819. The cubic root of 12880799 is about 234.4125905692.

The spelling of 12880799 in words is "twelve million, eight hundred eighty thousand, seven hundred ninety-nine".

Divisors: 1 307 41957 12880799