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12880807 = 22815647
BaseRepresentation
bin110001001000…
…101110100111
3220020102010221
4301020232213
511244141212
61140025211
7214325242
oct61105647
926212127
1012880807
1172a85a5
124392207
13288cba4
1419d4259
1511e6807
hexc48ba7

12880807 has 4 divisors (see below), whose sum is σ = 12888736. Its totient is φ = 12872880.

The previous prime is 12880793. The next prime is 12880811. The reversal of 12880807 is 70808821.

12880807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12880807 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 (12887807) 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, 543 + ... + 5104.

It is an arithmetic number, because the mean of its divisors is an integer number (3222184).

Almost surely, 212880807 is an apocalyptic number.

12880807 is a deficient number, since it is larger than the sum of its proper divisors (7929).

12880807 is an equidigital number, since it uses as much as digits as its factorization.

12880807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7928.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 12880807 is about 3588.9841181036. The cubic root of 12880807 is about 234.4126390988.

The spelling of 12880807 in words is "twelve million, eight hundred eighty thousand, eight hundred seven".

Divisors: 1 2281 5647 12880807