41821729 has 4 divisors (see below), whose sum is σ = 42952084. Its totient is φ = 40691376.

The previous prime is 41821727. The next prime is 41821771. The reversal of 41821729 is 92712814.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92712814 = 2 ⋅46356407.

It can be written as a sum of positive squares in 2 ways, for example, as 39187600 + 2634129 = 6260^2 + 1623^2 .

It is a cyclic number.

It is not a de Polignac number, because 41821729 - 2¹ = 41821727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 41821694 and 41821703.

It is not an unprimeable number, because it can be changed into a prime (41821727) 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, 565122 + ... + 565195.

It is an arithmetic number, because the mean of its divisors is an integer number (10738021).

Almost surely, 2^41821729 is an apocalyptic number.

It is an amenable number.

41821729 is a deficient number, since it is larger than the sum of its proper divisors (1130355).

41821729 is a wasteful number, since it uses less digits than its factorization.

41821729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130354.

The product of its digits is 8064, while the sum is 34.

The square root of 41821729 is about 6466.9721663233. The cubic root of 41821729 is about 347.1101616588.

The spelling of 41821729 in words is "forty-one million, eight hundred twenty-one thousand, seven hundred twenty-nine".