2405523 has 4 divisors (see below), whose sum is σ = 3207368. Its totient is φ = 1603680.

The previous prime is 2405509. The next prime is 2405527. The reversal of 2405523 is 3255042.

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

It is not a de Polignac number, because 2405523 - 2¹⁷ = 2274451 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 4⁹ + 0 + 5 + 5⁹ + 2¹⁷ + 3¹⁰ .

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2405523.

It is not an unprimeable number, because it can be changed into a prime (2405527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400918 + ... + 400923.

It is an arithmetic number, because the mean of its divisors is an integer number (801842).

2^2405523 is an apocalyptic number.

2405523 is a deficient number, since it is larger than the sum of its proper divisors (801845).

2405523 is an equidigital number, since it uses as much as digits as its factorization.

2405523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801844.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 2405523 is about 1550.9748547285. The cubic root of 2405523 is about 133.9892135076.

The spelling of 2405523 in words is "two million, four hundred five thousand, five hundred twenty-three".