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42390553 is a prime number
BaseRepresentation
bin1010000110110…
…1010000011001
32221202122220111
42201231100121
541322444203
64112324321
71023212422
oct241552031
987678814
1042390553
1121a23717
12122436a1
138a2298a
1458b6649
153ac526d
hex286d419

42390553 has 2 divisors, whose sum is σ = 42390554. Its totient is φ = 42390552.

The previous prime is 42390521. The next prime is 42390559. The reversal of 42390553 is 35509324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40921609 + 1468944 = 6397^2 + 1212^2 .

It is a cyclic number.

It is not a de Polignac number, because 42390553 - 25 = 42390521 is a prime.

It is not a weakly prime, because it can be changed into another prime (42390559) 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, 21195276 + 21195277.

It is an arithmetic number, because the mean of its divisors is an integer number (21195277).

Almost surely, 242390553 is an apocalyptic number.

It is an amenable number.

42390553 is a deficient number, since it is larger than the sum of its proper divisors (1).

42390553 is an equidigital number, since it uses as much as digits as its factorization.

42390553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 42390553 is about 6510.8027922830. The cubic root of 42390553 is about 348.6767805761.

Adding to 42390553 its reverse (35509324), we get a palindrome (77899877).

The spelling of 42390553 in words is "forty-two million, three hundred ninety thousand, five hundred fifty-three".