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1285082801 is a prime number
BaseRepresentation
bin100110010011000…
…1100111010110001
310022120002222012022
41030212030322301
510112440122201
6331303441225
743563011042
oct11446147261
93276088168
101285082801
115aa439802
122ba456215
13176314232
14c295a8c9
1577c4541b
hex4c98ceb1

1285082801 has 2 divisors, whose sum is σ = 1285082802. Its totient is φ = 1285082800.

The previous prime is 1285082783. The next prime is 1285082831. The reversal of 1285082801 is 1082805821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 698280625 + 586802176 = 26425^2 + 24224^2 .

It is an emirp because it is prime and its reverse (1082805821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285082801 - 226 = 1217973937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1285082831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642541400 + 642541401.

It is an arithmetic number, because the mean of its divisors is an integer number (642541401).

Almost surely, 21285082801 is an apocalyptic number.

It is an amenable number.

1285082801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285082801 is an equidigital number, since it uses as much as digits as its factorization.

1285082801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 1285082801 is about 35848.0515649038. The cubic root of 1285082801 is about 1087.2023198273.

The spelling of 1285082801 in words is "one billion, two hundred eighty-five million, eighty-two thousand, eight hundred one".