2420405 has 16 divisors (see below), whose sum is σ = 3265920. Its totient is φ = 1708608.

The previous prime is 2420399. The next prime is 2420417. The reversal of 2420405 is 5040242.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2420405 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 686 + ... + 2304.

It is an arithmetic number, because the mean of its divisors is an integer number (204120).

2^2420405 is an apocalyptic number.

It is an amenable number.

2420405 is a deficient number, since it is larger than the sum of its proper divisors (845515).

2420405 is a wasteful number, since it uses less digits than its factorization.

2420405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660.

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

The square root of 2420405 is about 1555.7650850948. The cubic root of 2420405 is about 134.2649580435.

Adding to 2420405 its reverse (5040242), we get a palindrome (7460647).

It can be divided in two parts, 2420 and 405, that multiplied together give a square (980100 = 990²).

The spelling of 2420405 in words is "two million, four hundred twenty thousand, four hundred five".