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12189941 = 43283487
BaseRepresentation
bin101110100000…
…000011110101
3211221022110022
4232200003311
511110034231
61113134525
7205420121
oct56400365
924838408
1012189941
116976535
1240ba445
1326aa5aa
141894581
15110bc7b
hexba00f5

12189941 has 4 divisors (see below), whose sum is σ = 12473472. Its totient is φ = 11906412.

The previous prime is 12189929. The next prime is 12189949. The reversal of 12189941 is 14998121.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12189941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189949) 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, 141701 + ... + 141786.

It is an arithmetic number, because the mean of its divisors is an integer number (3118368).

Almost surely, 212189941 is an apocalyptic number.

It is an amenable number.

12189941 is a deficient number, since it is larger than the sum of its proper divisors (283531).

12189941 is an equidigital number, since it uses as much as digits as its factorization.

12189941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283530.

The product of its digits is 5184, while the sum is 35.

The square root of 12189941 is about 3491.4096007200. The cubic root of 12189941 is about 230.1444650069.

The spelling of 12189941 in words is "twelve million, one hundred eighty-nine thousand, nine hundred forty-one".

Divisors: 1 43 283487 12189941