2837561 has 4 divisors (see below), whose sum is σ = 2860032. Its totient is φ = 2815092.

The previous prime is 2837557. The next prime is 2837581. The reversal of 2837561 is 1657382.

It is a happy number.

2837561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 1657382 = 2 ⋅828691.

It is a cyclic number.

It is not a de Polignac number, because 2837561 - 2² = 2837557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2837501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11045 + ... + 11298.

It is an arithmetic number, because the mean of its divisors is an integer number (715008).

2^2837561 is an apocalyptic number.

It is an amenable number.

2837561 is a deficient number, since it is larger than the sum of its proper divisors (22471).

2837561 is a wasteful number, since it uses less digits than its factorization.

2837561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22470.

The product of its digits is 10080, while the sum is 32.

The square root of 2837561 is about 1684.5061590864. The cubic root of 2837561 is about 141.5734239175.

The spelling of 2837561 in words is "two million, eight hundred thirty-seven thousand, five hundred sixty-one".