2405531 has 4 divisors (see below), whose sum is σ = 2408832. Its totient is φ = 2402232.

The previous prime is 2405527. The next prime is 2405539. The reversal of 2405531 is 1355042.

2405531 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2405531 - 2² = 2405527 is a prime.

It is a super-3 number, since 3×2405531³ = 41759388333970008873, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405539) 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, 20 + ... + 2193.

It is an arithmetic number, because the mean of its divisors is an integer number (602208).

2^2405531 is an apocalyptic number.

2405531 is a deficient number, since it is larger than the sum of its proper divisors (3301).

2405531 is a wasteful number, since it uses less digits than its factorization.

2405531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2405531 is about 1550.9774337494. The cubic root of 2405531 is about 133.9893620426.

The spelling of 2405531 in words is "two million, four hundred five thousand, five hundred thirty-one".