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12880033 = 173720477
BaseRepresentation
bin110001001000…
…100010100001
3220020101002021
4301020202201
511244130113
61140021441
7214323055
oct61104241
926211067
1012880033
1172a7a61
124391881
13288c72a
1419d3c65
1511e648d
hexc488a1

12880033 has 8 divisors (see below), whose sum is σ = 14006952. Its totient is φ = 11794176.

The previous prime is 12880019. The next prime is 12880061. The reversal of 12880033 is 33008821.

It can be written as a sum of positive squares in 4 ways, for example, as 8162449 + 4717584 = 2857^2 + 2172^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12880033 - 25 = 12880001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12880003) 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, 9610 + ... + 10867.

It is an arithmetic number, because the mean of its divisors is an integer number (1750869).

Almost surely, 212880033 is an apocalyptic number.

It is an amenable number.

12880033 is a deficient number, since it is larger than the sum of its proper divisors (1126919).

12880033 is a wasteful number, since it uses less digits than its factorization.

12880033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20531.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 12880033 is about 3588.8762865276. The cubic root of 12880033 is about 234.4079437662.

Adding to 12880033 its reverse (33008821), we get a palindrome (45888854).

The spelling of 12880033 in words is "twelve million, eight hundred eighty thousand, thirty-three".

Divisors: 1 17 37 629 20477 348109 757649 12880033