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42275561 is a prime number
BaseRepresentation
bin1010000101000…
…1001011101001
32221112211011112
42201101023221
541310304221
64110040105
71022223236
oct241211351
987484145
1042275561
1121955289
12121a9035
1389b2533
14588678d
153aa115b
hex28512e9

42275561 has 2 divisors, whose sum is σ = 42275562. Its totient is φ = 42275560.

The previous prime is 42275539. The next prime is 42275581. The reversal of 42275561 is 16557224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 3400336 = 6235^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 42275561 - 210 = 42274537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42275521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21137780 + 21137781.

It is an arithmetic number, because the mean of its divisors is an integer number (21137781).

Almost surely, 242275561 is an apocalyptic number.

It is an amenable number.

42275561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42275561 is an equidigital number, since it uses as much as digits as its factorization.

42275561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 32.

The square root of 42275561 is about 6501.9659334697. The cubic root of 42275561 is about 348.3612122301.

The spelling of 42275561 in words is "forty-two million, two hundred seventy-five thousand, five hundred sixty-one".