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12055999 = 83145253
BaseRepresentation
bin101101111111…
…010110111111
3211200111201111
4231333112333
511041242444
61110222451
7204321454
oct55772677
924614644
1012055999
11689493a
124054a27
132661637
14185b82b
1510d2234
hexb7f5bf

12055999 has 4 divisors (see below), whose sum is σ = 12201336. Its totient is φ = 11910664.

The previous prime is 12055997. The next prime is 12056003. The reversal of 12055999 is 99955021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12055999 - 21 = 12055997 is a prime.

It is a super-2 number, since 2×120559992 = 290694223776002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12055997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72544 + ... + 72709.

It is an arithmetic number, because the mean of its divisors is an integer number (3050334).

Almost surely, 212055999 is an apocalyptic number.

12055999 is a deficient number, since it is larger than the sum of its proper divisors (145337).

12055999 is an equidigital number, since it uses as much as digits as its factorization.

12055999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145336.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 12055999 is about 3472.1749667895. The cubic root of 12055999 is about 229.2984229374.

The spelling of 12055999 in words is "twelve million, fifty-five thousand, nine hundred ninety-nine".

Divisors: 1 83 145253 12055999