3505641 has 16 divisors (see below), whose sum is σ = 4817664. Its totient is φ = 2266704.

The previous prime is 3505631. The next prime is 3505651. The reversal of 3505641 is 1465053.

It is an interprime number because it is at equal distance from previous prime (3505631) and next prime (3505651).

It is not a de Polignac number, because 3505641 - 2⁶ = 3505577 is a prime.

It is a Curzon number.

3505641 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3505631) 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, 21426 + ... + 21588.

It is an arithmetic number, because the mean of its divisors is an integer number (301104).

Almost surely, 2^3505641 is an apocalyptic number.

It is an amenable number.

3505641 is a deficient number, since it is larger than the sum of its proper divisors (1312023).

3505641 is a wasteful number, since it uses less digits than its factorization.

3505641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 3505641 is about 1872.3357070782. The cubic root of 3505641 is about 151.9109733750.

The spelling of 3505641 in words is "three million, five hundred five thousand, six hundred forty-one".