2455405 has 4 divisors (see below), whose sum is σ = 2946492. Its totient is φ = 1964320.

The previous prime is 2455391. The next prime is 2455423. The reversal of 2455405 is 5045542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259081 + 2196324 = 509^2 + 1482^2 .

It is not a de Polignac number, because 2455405 - 2⁵ = 2455373 is a prime.

It is a Duffinian number.

2455405 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2455405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245536 + ... + 245545.

It is an arithmetic number, because the mean of its divisors is an integer number (736623).

2^2455405 is an apocalyptic number.

It is an amenable number.

2455405 is a deficient number, since it is larger than the sum of its proper divisors (491087).

2455405 is an equidigital number, since it uses as much as digits as its factorization.

2455405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491086.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 2455405 is about 1566.9731969629. The cubic root of 2455405 is about 134.9090379469.

The spelling of 2455405 in words is "two million, four hundred fifty-five thousand, four hundred five".