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12801213 = 33474119
BaseRepresentation
bin110000110101…
…010010111101
3220002100222000
4300311102331
511234114323
61134212513
7213544215
oct60652275
926070860
1012801213
117253817
124354139
1328628a9
1419b3245
1511cce43
hexc354bd

12801213 has 8 divisors (see below), whose sum is σ = 18964800. Its totient is φ = 8534124.

The previous prime is 12801203. The next prime is 12801241. The reversal of 12801213 is 31210821.

It is not a de Polignac number, because 12801213 - 212 = 12797117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12801203) 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 7 ways as a sum of consecutive naturals, for example, 237033 + ... + 237086.

It is an arithmetic number, because the mean of its divisors is an integer number (2370600).

Almost surely, 212801213 is an apocalyptic number.

It is an amenable number.

12801213 is a deficient number, since it is larger than the sum of its proper divisors (6163587).

12801213 is an equidigital number, since it uses as much as digits as its factorization.

12801213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474128 (or 474122 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 12801213 is about 3577.8782818872. The cubic root of 12801213 is about 233.9288080601.

The spelling of 12801213 in words is "twelve million, eight hundred one thousand, two hundred thirteen".

Divisors: 1 3 9 27 474119 1422357 4267071 12801213