42046289 has 2 divisors, whose sum is σ = 42046290. Its totient is φ = 42046288.

The previous prime is 42046241. The next prime is 42046307. The reversal of 42046289 is 98264024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35796289 + 6250000 = 5983^2 + 2500^2 .

It is a cyclic number.

It is not a de Polignac number, because 42046289 - 2¹⁶ = 41980753 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 (42046189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21023144 + 21023145.

It is an arithmetic number, because the mean of its divisors is an integer number (21023145).

Almost surely, 2^42046289 is an apocalyptic number.

It is an amenable number.

42046289 is a deficient number, since it is larger than the sum of its proper divisors (1).

42046289 is an equidigital number, since it uses as much as digits as its factorization.

42046289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 42046289 is about 6484.3109888407. The cubic root of 42046289 is about 347.7303174431.

The spelling of 42046289 in words is "forty-two million, forty-six thousand, two hundred eighty-nine".