3531645 has 24 divisors (see below), whose sum is σ = 6593496. Its totient is φ = 1738368.

The previous prime is 3531623. The next prime is 3531659. The reversal of 3531645 is 5461353.

It can be written as a sum of positive squares in 4 ways, for example, as 4761 + 3526884 = 69^2 + 1878^2 .

It is not a de Polignac number, because 3531645 - 2⁸ = 3531389 is a prime.

3531645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2434 + ... + 3603.

It is an arithmetic number, because the mean of its divisors is an integer number (274729).

Almost surely, 2^3531645 is an apocalyptic number.

It is an amenable number.

3531645 is a deficient number, since it is larger than the sum of its proper divisors (3061851).

3531645 is a wasteful number, since it uses less digits than its factorization.

3531645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061 (or 6058 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 3531645 is about 1879.2671443943. The cubic root of 3531645 is about 152.2856614434.

Adding to 3531645 its reverse (5461353), we get a palindrome (8992998).

The spelling of 3531645 in words is "three million, five hundred thirty-one thousand, six hundred forty-five".