2685405 has 16 divisors (see below), whose sum is σ = 4549824. Its totient is φ = 1347840.

The previous prime is 2685401. The next prime is 2685407. The reversal of 2685405 is 5045862.

It is not a de Polignac number, because 2685405 - 2² = 2685401 is a prime.

It is a super-2 number, since 2×2685405² = 14422800028050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5011 + ... + 5520.

It is an arithmetic number, because the mean of its divisors is an integer number (284364).

2^2685405 is an apocalyptic number.

It is an amenable number.

2685405 is a deficient number, since it is larger than the sum of its proper divisors (1864419).

2685405 is a wasteful number, since it uses less digits than its factorization.

2685405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2685405 is about 1638.7205374926. The cubic root of 2685405 is about 138.9963078915.

The spelling of 2685405 in words is "two million, six hundred eighty-five thousand, four hundred five".