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2856409 is a prime number
BaseRepresentation
bin1010111001010111011001
312101010020221
422321113121
51212401114
6141120041
733164503
oct12712731
95333227
102856409
111681076
12b59021
137901aa
14544d73
153b6524
hex2b95d9

2856409 has 2 divisors, whose sum is σ = 2856410. Its totient is φ = 2856408.

The previous prime is 2856397. The next prime is 2856419. The reversal of 2856409 is 9046582.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2673225 + 183184 = 1635^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 2856409 - 25 = 2856377 is a prime.

It is not a weakly prime, because it can be changed into another prime (2856419) 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, 1428204 + 1428205.

It is an arithmetic number, because the mean of its divisors is an integer number (1428205).

22856409 is an apocalyptic number.

It is an amenable number.

2856409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2856409 is an equidigital number, since it uses as much as digits as its factorization.

2856409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2856409 is about 1690.0914176458. The cubic root of 2856409 is about 141.8861912938.

The spelling of 2856409 in words is "two million, eight hundred fifty-six thousand, four hundred nine".