41115661 has 4 divisors (see below), whose sum is σ = 42118524. Its totient is φ = 40112800.

The previous prime is 41115637. The next prime is 41115667. The reversal of 41115661 is 16651114.

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 17892900 + 23222761 = 4230^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 41115661 - 2⁹ = 41115149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41115667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501370 + ... + 501451.

It is an arithmetic number, because the mean of its divisors is an integer number (10529631).

Almost surely, 2^41115661 is an apocalyptic number.

41115661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

41115661 is a deficient number, since it is larger than the sum of its proper divisors (1002863).

41115661 is a wasteful number, since it uses less digits than its factorization.

41115661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002862.

The product of its digits is 720, while the sum is 25.

The square root of 41115661 is about 6412.1494835975. The cubic root of 41115661 is about 345.1456669758.

Adding to 41115661 its reverse (16651114), we get a palindrome (57766775).

It can be divided in two parts, 4 and 1115661, that multiplied together give a palindrome (4462644).

The spelling of 41115661 in words is "forty-one million, one hundred fifteen thousand, six hundred sixty-one".