42004493 has 2 divisors, whose sum is σ = 42004494. Its totient is φ = 42004492.

The previous prime is 42004483. The next prime is 42004517. The reversal of 42004493 is 39440024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35844169 + 6160324 = 5987^2 + 2482^2 .

It is a cyclic number.

It is not a de Polignac number, because 42004493 - 2⁴ = 42004477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42004423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21002246 + 21002247.

It is an arithmetic number, because the mean of its divisors is an integer number (21002247).

Almost surely, 2^42004493 is an apocalyptic number.

It is an amenable number.

42004493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42004493 is an equidigital number, since it uses as much as digits as its factorization.

42004493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 42004493 is about 6481.0873316134. The cubic root of 42004493 is about 347.6150591163.

The spelling of 42004493 in words is "forty-two million, four thousand, four hundred ninety-three".