3504405 has 16 divisors (see below), whose sum is σ = 5632704. Its totient is φ = 1860480.

The previous prime is 3504377. The next prime is 3504407. The reversal of 3504405 is 5044053.

It is a happy number.

It is not a de Polignac number, because 3504405 - 2⁵ = 3504373 is a prime.

3504405 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3504407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4225 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (352044).

Almost surely, 2^3504405 is an apocalyptic number.

It is an amenable number.

3504405 is a deficient number, since it is larger than the sum of its proper divisors (2128299).

3504405 is a wasteful number, since it uses less digits than its factorization.

3504405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076.

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

The square root of 3504405 is about 1872.0056089660. The cubic root of 3504405 is about 151.8931179591.

Subtracting from 3504405 its sum of digits (21), we obtain a square (3504384 = 1872²).

Adding to 3504405 its reverse (5044053), we get a palindrome (8548458).

The spelling of 3504405 in words is "three million, five hundred four thousand, four hundred five".