3540405 has 32 divisors (see below), whose sum is σ = 6336000. Its totient is φ = 1673280.

The previous prime is 3540401. The next prime is 3540421. The reversal of 3540405 is 5040453.

It is a happy number.

3540405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3540405 - 2² = 3540401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3540401) 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 31 ways as a sum of consecutive naturals, for example, 6846 + ... + 7344.

It is an arithmetic number, because the mean of its divisors is an integer number (198000).

Almost surely, 2^3540405 is an apocalyptic number.

It is an amenable number.

3540405 is a deficient number, since it is larger than the sum of its proper divisors (2795595).

3540405 is a wasteful number, since it uses less digits than its factorization.

3540405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

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

The square root of 3540405 is about 1881.5963966802. The cubic root of 3540405 is about 152.4114688154.

Adding to 3540405 its reverse (5040453), we get a palindrome (8580858).

The spelling of 3540405 in words is "three million, five hundred forty thousand, four hundred five".