42004287 has 48 divisors (see below), whose sum is σ = 69491968. Its totient is φ = 24261120.

The previous prime is 42004219. The next prime is 42004301. The reversal of 42004287 is 78240024.

It is not a de Polignac number, because 42004287 - 2⁷ = 42004159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42004287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004387) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134043 + ... + 134355.

Almost surely, 2^42004287 is an apocalyptic number.

42004287 is a deficient number, since it is larger than the sum of its proper divisors (27487681).

42004287 is a wasteful number, since it uses less digits than its factorization.

42004287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 42004287 is about 6481.0714391989. The cubic root of 42004287 is about 347.6144908531.

The spelling of 42004287 in words is "forty-two million, four thousand, two hundred eighty-seven".