42801389 has 2 divisors, whose sum is σ = 42801390. Its totient is φ = 42801388.

The previous prime is 42801379. The next prime is 42801431. The reversal of 42801389 is 98310824.

It is a happy number.

42801389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34633225 + 8168164 = 5885^2 + 2858^2 .

It is a cyclic number.

It is not a de Polignac number, because 42801389 - 2⁸ = 42801133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42801329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21400694 + 21400695.

It is an arithmetic number, because the mean of its divisors is an integer number (21400695).

Almost surely, 2^42801389 is an apocalyptic number.

It is an amenable number.

42801389 is a deficient number, since it is larger than the sum of its proper divisors (1).

42801389 is an equidigital number, since it uses as much as digits as its factorization.

42801389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 42801389 is about 6542.2770500797. The cubic root of 42801389 is about 349.7995832186.

The spelling of 42801389 in words is "forty-two million, eight hundred one thousand, three hundred eighty-nine".