3561445 has 4 divisors (see below), whose sum is σ = 4273740. Its totient is φ = 2849152.

The previous prime is 3561443. The next prime is 3561479. The reversal of 3561445 is 5441653.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1329409 + 2232036 = 1153^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 3561445 - 2¹ = 3561443 is a prime.

3561445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356140 + ... + 356149.

It is an arithmetic number, because the mean of its divisors is an integer number (1068435).

Almost surely, 2^3561445 is an apocalyptic number.

It is an amenable number.

3561445 is a deficient number, since it is larger than the sum of its proper divisors (712295).

3561445 is an equidigital number, since it uses as much as digits as its factorization.

3561445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712294.

The product of its digits is 7200, while the sum is 28.

The square root of 3561445 is about 1887.1791117962. The cubic root of 3561445 is about 152.7127908239.

The spelling of 3561445 in words is "three million, five hundred sixty-one thousand, four hundred forty-five".