42259489 has 2 divisors, whose sum is σ = 42259490. Its totient is φ = 42259488.

The previous prime is 42259447. The next prime is 42259493. The reversal of 42259489 is 98495224.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41177889 + 1081600 = 6417^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 42259489 - 2⁷ = 42259361 is a prime.

It is a super-2 number, since 2×42259489² = 3571728821082242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42259429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21129744 + 21129745.

It is an arithmetic number, because the mean of its divisors is an integer number (21129745).

Almost surely, 2^42259489 is an apocalyptic number.

It is an amenable number.

42259489 is a deficient number, since it is larger than the sum of its proper divisors (1).

42259489 is an equidigital number, since it uses as much as digits as its factorization.

42259489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 42259489 is about 6500.7298820979. The cubic root of 42259489 is about 348.3170608659.

The spelling of 42259489 in words is "forty-two million, two hundred fifty-nine thousand, four hundred eighty-nine".