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12880837 = 13198327
BaseRepresentation
bin110001001000…
…101111000101
3220020102012001
4301020233011
511244141322
61140025301
7214325314
oct61105705
926212161
1012880837
1172a8622
124392231
13288cbc8
1419d427b
1511e6827
hexc48bc5

12880837 has 4 divisors (see below), whose sum is σ = 12979296. Its totient is φ = 12782380.

The previous prime is 12880831. The next prime is 12880859. The reversal of 12880837 is 73808821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73808821 = 371994833.

It is a cyclic number.

It is not a de Polignac number, because 12880837 - 27 = 12880709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12880796 and 12880805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12880831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49033 + ... + 49294.

It is an arithmetic number, because the mean of its divisors is an integer number (3244824).

Almost surely, 212880837 is an apocalyptic number.

It is an amenable number.

12880837 is a deficient number, since it is larger than the sum of its proper divisors (98459).

12880837 is an equidigital number, since it uses as much as digits as its factorization.

12880837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98458.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 12880837 is about 3588.9882975568. The cubic root of 12880837 is about 234.4128210846.

The spelling of 12880837 in words is "twelve million, eight hundred eighty thousand, eight hundred thirty-seven".

Divisors: 1 131 98327 12880837