61642105 has 16 divisors (see below), whose sum is σ = 87266304. Its totient is φ = 40904640.

The previous prime is 61642103. The next prime is 61642109. The reversal of 61642105 is 50124616.

It is not a de Polignac number, because 61642105 - 2¹ = 61642103 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 61642105.

It is not an unprimeable number, because it can be changed into a prime (61642103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27322 + ... + 29491.

It is an arithmetic number, because the mean of its divisors is an integer number (5454144).

Almost surely, 2^61642105 is an apocalyptic number.

It is an amenable number.

61642105 is a deficient number, since it is larger than the sum of its proper divisors (25624199).

61642105 is a wasteful number, since it uses less digits than its factorization.

61642105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56856.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 61642105 is about 7851.2486268109. The cubic root of 61642105 is about 395.0261265633.

The spelling of 61642105 in words is "sixty-one million, six hundred forty-two thousand, one hundred five".