2012405 has 8 divisors (see below), whose sum is σ = 2425272. Its totient is φ = 1603008.

The previous prime is 2012401. The next prime is 2012407. The reversal of 2012405 is 5042102.

It can be written as a sum of positive squares in 4 ways, for example, as 391876 + 1620529 = 626^2 + 1273^2 .

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 2012405 - 2² = 2012401 is a prime.

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 2012405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012401) 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, 659 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (303159).

2^2012405 is an apocalyptic number.

It is an amenable number.

2012405 is a deficient number, since it is larger than the sum of its proper divisors (412867).

2012405 is a wasteful number, since it uses less digits than its factorization.

2012405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2012405 is about 1418.5926124156. The cubic root of 2012405 is about 126.2520569544.

Adding to 2012405 its reverse (5042102), we get a palindrome (7054507).

The spelling of 2012405 in words is "two million, twelve thousand, four hundred five".