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1066102421 is a prime number
BaseRepresentation
bin111111100010110…
…110111010010101
32202022001121120212
4333202312322111
54140410234141
6253442135205
735263502216
oct7742667225
92668047525
101066102421
114a787258a
12259051505
1313cb42947
14a183740d
15638dc2eb
hex3f8b6e95

1066102421 has 2 divisors, whose sum is σ = 1066102422. Its totient is φ = 1066102420.

The previous prime is 1066102399. The next prime is 1066102441. The reversal of 1066102421 is 1242016601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967894321 + 98208100 = 31111^2 + 9910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066102421 - 222 = 1061908117 is a prime.

It is a super-2 number, since 2×10661024212 = 2273148744124122482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066102441) 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 as a sum of consecutive naturals, namely, 533051210 + 533051211.

It is an arithmetic number, because the mean of its divisors is an integer number (533051211).

Almost surely, 21066102421 is an apocalyptic number.

It is an amenable number.

1066102421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066102421 is an equidigital number, since it uses as much as digits as its factorization.

1066102421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1066102421 is about 32651.2238821150. The cubic root of 1066102421 is about 1021.5657169246.

The spelling of 1066102421 in words is "one billion, sixty-six million, one hundred two thousand, four hundred twenty-one".