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12880761 = 311293803
BaseRepresentation
bin110001001000…
…101101111001
3220020102002020
4301020231321
511244141021
61140025053
7214325145
oct61105571
926212066
1012880761
1172a8563
124392189
13288cb6a
1419d4225
1511e67c6
hexc48b79

12880761 has 8 divisors (see below), whose sum is σ = 17194080. Its totient is φ = 8577312.

The previous prime is 12880741. The next prime is 12880783. The reversal of 12880761 is 16708821.

It is a happy number.

12880761 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12880761 - 25 = 12880729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12880711) 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, 1486 + ... + 5288.

It is an arithmetic number, because the mean of its divisors is an integer number (2149260).

Almost surely, 212880761 is an apocalyptic number.

It is an amenable number.

12880761 is a deficient number, since it is larger than the sum of its proper divisors (4313319).

12880761 is a wasteful number, since it uses less digits than its factorization.

12880761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 12880761 is about 3588.9777095992. The cubic root of 12880761 is about 234.4123600533.

The spelling of 12880761 in words is "twelve million, eight hundred eighty thousand, seven hundred sixty-one".

Divisors: 1 3 1129 3387 3803 11409 4293587 12880761