42004399 has 8 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 39438336.

The previous prime is 42004397. The next prime is 42004409. The reversal of 42004399 is 99340024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42004399 - 2¹ = 42004397 is a prime.

It is a super-3 number, since 3×42004399³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42004399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4882 + ... + 10384.

It is an arithmetic number, because the mean of its divisors is an integer number (5572800).

Almost surely, 2^42004399 is an apocalyptic number.

42004399 is a deficient number, since it is larger than the sum of its proper divisors (2578001).

42004399 is a wasteful number, since it uses less digits than its factorization.

42004399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42004399 is about 6481.0800797398. The cubic root of 42004399 is about 347.6147998120.

The spelling of 42004399 in words is "forty-two million, four thousand, three hundred ninety-nine".