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12201361 = 25148611
BaseRepresentation
bin101110100010…
…110110010001
3211221220010021
4232202312101
511110420421
61113303441
7205465324
oct56426621
924856107
1012201361
116984077
124104b81
1326b2853
1418987bb
151110341
hexba2d91

12201361 has 4 divisors (see below), whose sum is σ = 12250224. Its totient is φ = 12152500.

The previous prime is 12201353. The next prime is 12201367. The reversal of 12201361 is 16310221.

12201361 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16310221 = 19782793.

It is a cyclic number.

It is not a de Polignac number, because 12201361 - 23 = 12201353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12201367) 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, 24055 + ... + 24556.

It is an arithmetic number, because the mean of its divisors is an integer number (3062556).

Almost surely, 212201361 is an apocalyptic number.

It is an amenable number.

12201361 is a deficient number, since it is larger than the sum of its proper divisors (48863).

12201361 is an equidigital number, since it uses as much as digits as its factorization.

12201361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48862.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12201361 is about 3493.0446604646. The cubic root of 12201361 is about 230.2163119357.

Adding to 12201361 its reverse (16310221), we get a palindrome (28511582).

The spelling of 12201361 in words is "twelve million, two hundred one thousand, three hundred sixty-one".

Divisors: 1 251 48611 12201361