4509405 has 16 divisors (see below), whose sum is σ = 8016960. Its totient is φ = 2404944.

The previous prime is 4509377. The next prime is 4509409. The reversal of 4509405 is 5049054.

It is not a de Polignac number, because 4509405 - 2⁶ = 4509341 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4509409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16567 + ... + 16836.

It is an arithmetic number, because the mean of its divisors is an integer number (501060).

Almost surely, 2^4509405 is an apocalyptic number.

4509405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4509405 is a deficient number, since it is larger than the sum of its proper divisors (3507555).

4509405 is a wasteful number, since it uses less digits than its factorization.

4509405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33417 (or 33411 counting only the distinct ones).

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

The square root of 4509405 is about 2123.5359662600. The cubic root of 4509405 is about 165.2112995415.

The spelling of 4509405 in words is "four million, five hundred nine thousand, four hundred five".