42496409 has 2 divisors, whose sum is σ = 42496410. Its totient is φ = 42496408.

The previous prime is 42496403. The next prime is 42496417. The reversal of 42496409 is 90469424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41319184 + 1177225 = 6428^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 42496409 - 2⁴ = 42496393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42496403) 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, 21248204 + 21248205.

It is an arithmetic number, because the mean of its divisors is an integer number (21248205).

Almost surely, 2^42496409 is an apocalyptic number.

It is an amenable number.

42496409 is a deficient number, since it is larger than the sum of its proper divisors (1).

42496409 is an equidigital number, since it uses as much as digits as its factorization.

42496409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42496409 is about 6518.9269822571. The cubic root of 42496409 is about 348.9667732452.

The spelling of 42496409 in words is "forty-two million, four hundred ninety-six thousand, four hundred nine".