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1285741 is a prime number
BaseRepresentation
bin100111001111001101101
32102022201001
410321321231
5312120431
643320301
713633342
oct4717155
92368631
101285741
117a8aa6
12520091
133602c2
142567c9
151a5e61
hex139e6d

1285741 has 2 divisors, whose sum is σ = 1285742. Its totient is φ = 1285740.

The previous prime is 1285717. The next prime is 1285747. The reversal of 1285741 is 1475821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 715716 + 570025 = 846^2 + 755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1285741 is a prime.

1285741 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642870 + 642871.

It is an arithmetic number, because the mean of its divisors is an integer number (642871).

21285741 is an apocalyptic number.

It is an amenable number.

1285741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285741 is an equidigital number, since it uses as much as digits as its factorization.

1285741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 28.

The square root of 1285741 is about 1133.9051988592. The cubic root of 1285741 is about 108.7387904067.

The spelling of 1285741 in words is "one million, two hundred eighty-five thousand, seven hundred forty-one".