42489361 has 2 divisors, whose sum is σ = 42489362. Its totient is φ = 42489360.

The previous prime is 42489331. The next prime is 42489371. The reversal of 42489361 is 16398424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29637136 + 12852225 = 5444^2 + 3585^2 .

It is a cyclic number.

It is not a de Polignac number, because 42489361 - 2⁵ = 42489329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42489361.

It is not a weakly prime, because it can be changed into another prime (42489331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21244680 + 21244681.

It is an arithmetic number, because the mean of its divisors is an integer number (21244681).

Almost surely, 2^42489361 is an apocalyptic number.

It is an amenable number.

42489361 is a deficient number, since it is larger than the sum of its proper divisors (1).

42489361 is an equidigital number, since it uses as much as digits as its factorization.

42489361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 42489361 is about 6518.3863800790. The cubic root of 42489361 is about 348.9474802127.

The spelling of 42489361 in words is "forty-two million, four hundred eighty-nine thousand, three hundred sixty-one".