61612105 has 4 divisors (see below), whose sum is σ = 73934532. Its totient is φ = 49289680.

The previous prime is 61612099. The next prime is 61612123. The reversal of 61612105 is 50121616.

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 10188864 + 51423241 = 3192^2 + 7171^2 .

It is not a de Polignac number, because 61612105 - 2¹⁷ = 61481033 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6161206 + ... + 6161215.

It is an arithmetic number, because the mean of its divisors is an integer number (18483633).

Almost surely, 2^61612105 is an apocalyptic number.

It is an amenable number.

61612105 is a deficient number, since it is larger than the sum of its proper divisors (12322427).

61612105 is a wasteful number, since it uses less digits than its factorization.

61612105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12322426.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 61612105 is about 7849.3378701646. The cubic root of 61612105 is about 394.9620323491.

It can be divided in two parts, 616 and 12105, that added together give a palindrome (12721).

The spelling of 61612105 in words is "sixty-one million, six hundred twelve thousand, one hundred five".