5561261 has 4 divisors (see below), whose sum is σ = 5888412. Its totient is φ = 5234112.

The previous prime is 5561221. The next prime is 5561263. The reversal of 5561261 is 1621655.

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 1974025 + 3587236 = 1405^2 + 1894^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561261 - 2¹⁰ = 5560237 is a prime.

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 5561261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561263) 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, 163550 + ... + 163583.

It is an arithmetic number, because the mean of its divisors is an integer number (1472103).

Almost surely, 2^5561261 is an apocalyptic number.

It is an amenable number.

5561261 is a deficient number, since it is larger than the sum of its proper divisors (327151).

5561261 is a wasteful number, since it uses less digits than its factorization.

5561261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327150.

The product of its digits is 1800, while the sum is 26.

The square root of 5561261 is about 2358.2326009111. The cubic root of 5561261 is about 177.1703701815.

It can be divided in two parts, 55 and 61261, that added together give a palindrome (61316).

The spelling of 5561261 in words is "five million, five hundred sixty-one thousand, two hundred sixty-one".