2042405 has 8 divisors (see below), whose sum is σ = 2580000. Its totient is φ = 1547856.

The previous prime is 2042401. The next prime is 2042419. The reversal of 2042405 is 5042402.

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 2042405 - 2² = 2042401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10655 + ... + 10844.

It is an arithmetic number, because the mean of its divisors is an integer number (322500).

2^2042405 is an apocalyptic number.

It is an amenable number.

2042405 is a deficient number, since it is larger than the sum of its proper divisors (537595).

2042405 is a wasteful number, since it uses less digits than its factorization.

2042405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21523.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 2042405 is about 1429.1273561163. The cubic root of 2042405 is about 126.8763340392.

Adding to 2042405 its reverse (5042402), we get a palindrome (7084807).

The spelling of 2042405 in words is "two million, forty-two thousand, four hundred five".