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12405331 is a prime number
BaseRepresentation
bin101111010100…
…101001010011
3212100020220201
4233110221103
511133432311
61121520031
7210305101
oct57245123
925306821
1012405331
117003344
1241a3017
132754643
14190cc71
1511509c1
hexbd4a53

12405331 has 2 divisors, whose sum is σ = 12405332. Its totient is φ = 12405330.

The previous prime is 12405319. The next prime is 12405343. The reversal of 12405331 is 13350421.

It is a balanced prime because it is at equal distance from previous prime (12405319) and next prime (12405343).

It is a cyclic number.

It is not a de Polignac number, because 12405331 - 25 = 12405299 is a prime.

It is a super-2 number, since 2×124053312 = 307784474439122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12405299 and 12405308.

It is not a weakly prime, because it can be changed into another prime (12405391) 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 as a sum of consecutive naturals, namely, 6202665 + 6202666.

It is an arithmetic number, because the mean of its divisors is an integer number (6202666).

Almost surely, 212405331 is an apocalyptic number.

12405331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12405331 is an equidigital number, since it uses as much as digits as its factorization.

12405331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 12405331 is about 3522.1202421269. The cubic root of 12405331 is about 231.4920702547.

Adding to 12405331 its reverse (13350421), we get a palindrome (25755752).

The spelling of 12405331 in words is "twelve million, four hundred five thousand, three hundred thirty-one".