5287561 has 4 divisors (see below), whose sum is σ = 5598612. Its totient is φ = 4976512.

The previous prime is 5287543. The next prime is 5287571. The reversal of 5287561 is 1657825.

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 4840000 + 447561 = 2200^2 + 669^2 .

It is not a de Polignac number, because 5287561 - 2¹¹ = 5285513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5287501) 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, 155500 + ... + 155533.

It is an arithmetic number, because the mean of its divisors is an integer number (1399653).

Almost surely, 2^5287561 is an apocalyptic number.

It is an amenable number.

5287561 is a deficient number, since it is larger than the sum of its proper divisors (311051).

5287561 is a wasteful number, since it uses less digits than its factorization.

5287561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311050.

The product of its digits is 16800, while the sum is 34.

The square root of 5287561 is about 2299.4697214793. The cubic root of 5287561 is about 174.2148335094.

The spelling of 5287561 in words is "five million, two hundred eighty-seven thousand, five hundred sixty-one".