6872405 has 4 divisors (see below), whose sum is σ = 8246892. Its totient is φ = 5497920.

The previous prime is 6872381. The next prime is 6872419. The reversal of 6872405 is 5042786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2093809 + 4778596 = 1447^2 + 2186^2 .

It is not a de Polignac number, because 6872405 - 2⁸ = 6872149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687236 + ... + 687245.

It is an arithmetic number, because the mean of its divisors is an integer number (2061723).

Almost surely, 2^6872405 is an apocalyptic number.

It is an amenable number.

6872405 is a deficient number, since it is larger than the sum of its proper divisors (1374487).

6872405 is a wasteful number, since it uses less digits than its factorization.

6872405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374486.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 6872405 is about 2621.5272266372. The cubic root of 6872405 is about 190.1236959992.

The spelling of 6872405 in words is "six million, eight hundred seventy-two thousand, four hundred five".