561044121 has 32 divisors (see below), whose sum is σ = 852249600. Its totient is φ = 325174080.

The previous prime is 561044119. The next prime is 561044137. The reversal of 561044121 is 121440165.

It is a happy number.

It is not a de Polignac number, because 561044121 - 2¹ = 561044119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561044091 and 561044100.

It is not an unprimeable number, because it can be changed into a prime (561044101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99660 + ... + 105138.

It is an arithmetic number, because the mean of its divisors is an integer number (26632800).

Almost surely, 2^561044121 is an apocalyptic number.

It is an amenable number.

561044121 is a deficient number, since it is larger than the sum of its proper divisors (291205479).

561044121 is a wasteful number, since it uses less digits than its factorization.

561044121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 561044121 is about 23686.3699413819. The cubic root of 561044121 is about 824.7690181645.

Adding to 561044121 its reverse (121440165), we get a palindrome (682484286).

It can be divided in two parts, 561044 and 121, that added together give a palindrome (561165).

The spelling of 561044121 in words is "five hundred sixty-one million, forty-four thousand, one hundred twenty-one".