3561559 has 4 divisors (see below), whose sum is σ = 3676480. Its totient is φ = 3446640.

The previous prime is 3561541. The next prime is 3561581. The reversal of 3561559 is 9551653.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9551653 = 79 ⋅120907.

It is a cyclic number.

It is not a de Polignac number, because 3561559 - 2¹⁷ = 3430487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561529) 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, 57414 + ... + 57475.

It is an arithmetic number, because the mean of its divisors is an integer number (919120).

Almost surely, 2^3561559 is an apocalyptic number.

3561559 is a deficient number, since it is larger than the sum of its proper divisors (114921).

3561559 is a wasteful number, since it uses less digits than its factorization.

3561559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114920.

The product of its digits is 20250, while the sum is 34.

The square root of 3561559 is about 1887.2093153649. The cubic root of 3561559 is about 152.7144202255.

The spelling of 3561559 in words is "three million, five hundred sixty-one thousand, five hundred fifty-nine".