4540905 has 48 divisors (see below), whose sum is σ = 8536320. Its totient is φ = 2225664.

The previous prime is 4540903. The next prime is 4540909. The reversal of 4540905 is 5090454.

It is not a de Polignac number, because 4540905 - 2¹ = 4540903 is a prime.

4540905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4540903) 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 47 ways as a sum of consecutive naturals, for example, 40129 + ... + 40241.

It is an arithmetic number, because the mean of its divisors is an integer number (177840).

Almost surely, 2^4540905 is an apocalyptic number.

4540905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4540905 is a deficient number, since it is larger than the sum of its proper divisors (3995415).

4540905 is a wasteful number, since it uses less digits than its factorization.

4540905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 4540905 is about 2130.9399334566. The cubic root of 4540905 is about 165.5950962981.

It can be divided in two parts, 4540 and 905, that added together give a palindrome (5445).

The spelling of 4540905 in words is "four million, five hundred forty thousand, nine hundred five".