42012289 has 6 divisors (see below), whose sum is σ = 46178930. Its totient is φ = 38192880.

The previous prime is 42012281. The next prime is 42012293. The reversal of 42012289 is 98221024.

It can be written as a sum of positive squares in only one way, i.e., 22165264 + 19847025 = 4708^2 + 4455^2 .

It is not a de Polignac number, because 42012289 - 2³ = 42012281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42012281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173484 + ... + 173725.

Almost surely, 2^42012289 is an apocalyptic number.

It is an amenable number.

42012289 is a deficient number, since it is larger than the sum of its proper divisors (4166641).

42012289 is a wasteful number, since it uses less digits than its factorization.

42012289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347231 (or 347220 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42012289 is about 6481.6887459982. The cubic root of 42012289 is about 347.6365634774.

The spelling of 42012289 in words is "forty-two million, twelve thousand, two hundred eighty-nine".