2405403 has 64 divisors (see below), whose sum is σ = 4838400. Its totient is φ = 1140480.

The previous prime is 2405399. The next prime is 2405437. The reversal of 2405403 is 3045042.

It is a happy number.

It is not a de Polignac number, because 2405403 - 2² = 2405399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2405443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26983 + ... + 27071.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2^2405403 is an apocalyptic number.

2405403 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

2405403 is a wasteful number, since it uses less digits than its factorization.

2405403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 2405403 is about 1550.9361688993. The cubic root of 2405403 is about 133.9869854443.

The spelling of 2405403 in words is "two million, four hundred five thousand, four hundred three".