404139 has 8 divisors (see below), whose sum is σ = 544320. Its totient is φ = 266696.

The previous prime is 404123. The next prime is 404161. The reversal of 404139 is 931404.

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 404139 - 2⁴ = 404123 is a prime.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (404119) 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, 309 + ... + 950.

It is an arithmetic number, because the mean of its divisors is an integer number (68040).

2⁴⁰⁴¹³⁹ is an apocalyptic number.

404139 is a deficient number, since it is larger than the sum of its proper divisors (140181).

404139 is a wasteful number, since it uses less digits than its factorization.

404139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 404139 is about 635.7192776690. The cubic root of 404139 is about 73.9338951901.

The spelling of 404139 in words is "four hundred four thousand, one hundred thirty-nine".