5312561 has 4 divisors (see below), whose sum is σ = 5412852. Its totient is φ = 5212272.

The previous prime is 5312557. The next prime is 5312579. The reversal of 5312561 is 1652135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652135 = 5 ⋅330427.

It can be written as a sum of positive squares in 2 ways, for example, as 1960000 + 3352561 = 1400^2 + 1831^2 .

It is a cyclic number.

It is not a de Polignac number, because 5312561 - 2² = 5312557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5312591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50066 + ... + 50171.

It is an arithmetic number, because the mean of its divisors is an integer number (1353213).

Almost surely, 2^5312561 is an apocalyptic number.

It is an amenable number.

5312561 is a deficient number, since it is larger than the sum of its proper divisors (100291).

5312561 is a wasteful number, since it uses less digits than its factorization.

5312561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100290.

The product of its digits is 900, while the sum is 23.

The square root of 5312561 is about 2304.8993470432. The cubic root of 5312561 is about 174.4889690156.

Adding to 5312561 its reverse (1652135), we get a palindrome (6964696).

The spelling of 5312561 in words is "five million, three hundred twelve thousand, five hundred sixty-one".