2869561 has 4 divisors (see below), whose sum is σ = 2886912. Its totient is φ = 2852212.

The previous prime is 2869553. The next prime is 2869567. The reversal of 2869561 is 1659682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1659682 = 2 ⋅829841.

It is a cyclic number.

It is not a de Polignac number, because 2869561 - 2³ = 2869553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2869561.

It is not an unprimeable number, because it can be changed into a prime (2869567) 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, 8425 + ... + 8758.

It is an arithmetic number, because the mean of its divisors is an integer number (721728).

2^2869561 is an apocalyptic number.

It is an amenable number.

2869561 is a deficient number, since it is larger than the sum of its proper divisors (17351).

2869561 is a wasteful number, since it uses less digits than its factorization.

2869561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17350.

The product of its digits is 25920, while the sum is 37.

The square root of 2869561 is about 1693.9778629014. The cubic root of 2869561 is about 142.1036240251.

The spelling of 2869561 in words is "two million, eight hundred sixty-nine thousand, five hundred sixty-one".