561277741 has 4 divisors (see below), whose sum is σ = 574967484. Its totient is φ = 547588000.

The previous prime is 561277711. The next prime is 561277747. The reversal of 561277741 is 147772165.

It is a happy number.

561277741 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 an emirpimes, since its reverse is a distinct semiprime: 147772165 = 5 ⋅29554433.

It can be written as a sum of positive squares in 2 ways, for example, as 213306025 + 347971716 = 14605^2 + 18654^2 .

It is a cyclic number.

It is not a de Polignac number, because 561277741 - 2¹³ = 561269549 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561277694 and 561277703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561277747) 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, 6844810 + ... + 6844891.

It is an arithmetic number, because the mean of its divisors is an integer number (143741871).

Almost surely, 2^561277741 is an apocalyptic number.

It is an amenable number.

561277741 is a deficient number, since it is larger than the sum of its proper divisors (13689743).

561277741 is a wasteful number, since it uses less digits than its factorization.

561277741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13689742.

The product of its digits is 82320, while the sum is 40.

The square root of 561277741 is about 23691.3009562582. The cubic root of 561277741 is about 824.8834808199.

The spelling of 561277741 in words is "five hundred sixty-one million, two hundred seventy-seven thousand, seven hundred forty-one".