561612105 has 12 divisors (see below), whose sum is σ = 973461060. Its totient is φ = 299526432.

The previous prime is 561612101. The next prime is 561612109. The reversal of 561612105 is 501216165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (561612101) and next prime (561612109).

It can be written as a sum of positive squares in 2 ways, for example, as 286184889 + 275427216 = 16917^2 + 16596^2 .

It is not a de Polignac number, because 561612105 - 2² = 561612101 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (561612101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6240090 + ... + 6240179.

It is an arithmetic number, because the mean of its divisors is an integer number (81121755).

Almost surely, 2^561612105 is an apocalyptic number.

It is an amenable number.

561612105 is a deficient number, since it is larger than the sum of its proper divisors (411848955).

561612105 is a wasteful number, since it uses less digits than its factorization.

561612105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12480280 (or 12480277 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 561612105 is about 23698.3565885907. The cubic root of 561612105 is about 825.0472479827.

It can be divided in two parts, 56 and 1612105, that added together give a palindrome (1612161).

The spelling of 561612105 in words is "five hundred sixty-one million, six hundred twelve thousand, one hundred five".