61172705 has 16 divisors (see below), whose sum is σ = 80241408. Its totient is φ = 44400000.

The previous prime is 61172693. The next prime is 61172707. The reversal of 61172705 is 50727116.

It is not a de Polignac number, because 61172705 - 2¹² = 61168609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61172707) 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, 40565 + ... + 42045.

It is an arithmetic number, because the mean of its divisors is an integer number (5015088).

Almost surely, 2^61172705 is an apocalyptic number.

It is an amenable number.

61172705 is a deficient number, since it is larger than the sum of its proper divisors (19068703).

61172705 is a wasteful number, since it uses less digits than its factorization.

61172705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 61172705 is about 7821.2981659057. The cubic root of 61172705 is about 394.0208724889.

It can be divided in two parts, 6 and 1172705, that added together give a palindrome (1172711).

The spelling of 61172705 in words is "sixty-one million, one hundred seventy-two thousand, seven hundred five".