3561506 has 24 divisors (see below), whose sum is σ = 5948964. Its totient is φ = 1597440.

The previous prime is 3561499. The next prime is 3561511. The reversal of 3561506 is 6051653.

It can be written as a sum of positive squares in 6 ways, for example, as 654481 + 2907025 = 809^2 + 1705^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13730 + ... + 13986.

Almost surely, 2^3561506 is an apocalyptic number.

3561506 is a deficient number, since it is larger than the sum of its proper divisors (2387458).

3561506 is a wasteful number, since it uses less digits than its factorization.

3561506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3561506 is about 1887.1952734150. The cubic root of 3561506 is about 152.7136627010.

The spelling of 3561506 in words is "three million, five hundred sixty-one thousand, five hundred six".