41128709 has 4 divisors (see below), whose sum is σ = 41145804. Its totient is φ = 41111616.

The previous prime is 41128697. The next prime is 41128721. The reversal of 41128709 is 90782114.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (41128697) and next prime (41128721).

It can be written as a sum of positive squares in 2 ways, for example, as 25502500 + 15626209 = 5050^2 + 3953^2 .

It is a cyclic number.

It is not a de Polignac number, because 41128709 - 2⁴ = 41128693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41128739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4202 + ... + 9995.

It is an arithmetic number, because the mean of its divisors is an integer number (10286451).

Almost surely, 2^41128709 is an apocalyptic number.

It is an amenable number.

41128709 is a deficient number, since it is larger than the sum of its proper divisors (17095).

41128709 is a wasteful number, since it uses less digits than its factorization.

41128709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17094.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 41128709 is about 6413.1668464184. The cubic root of 41128709 is about 345.1821736195.

It can be divided in two parts, 4112 and 8709, that added together give a palindrome (12821).

The spelling of 41128709 in words is "forty-one million, one hundred twenty-eight thousand, seven hundred nine".