2403655 has 4 divisors (see below), whose sum is σ = 2884392. Its totient is φ = 1922920.

The previous prime is 2403629. The next prime is 2403659. The reversal of 2403655 is 5563042.

2403655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5563042 = 2 ⋅2781521.

It is not a de Polignac number, because 2403655 - 2²¹ = 306503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403659) 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 3 ways as a sum of consecutive naturals, for example, 240361 + ... + 240370.

It is an arithmetic number, because the mean of its divisors is an integer number (721098).

2^2403655 is an apocalyptic number.

2403655 is a deficient number, since it is larger than the sum of its proper divisors (480737).

2403655 is an equidigital number, since it uses as much as digits as its factorization.

2403655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480736.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2403655 is about 1550.3725358765. The cubic root of 2403655 is about 133.9545215832.

Adding to 2403655 its reverse (5563042), we get a palindrome (7966697).

The spelling of 2403655 in words is "two million, four hundred three thousand, six hundred fifty-five".