41002781 has 4 divisors (see below), whose sum is σ = 42416700. Its totient is φ = 39588864.

The previous prime is 41002777. The next prime is 41002789. The reversal of 41002781 is 18720014.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18720014 = 2 ⋅9360007.

It can be written as a sum of positive squares in 2 ways, for example, as 32205625 + 8797156 = 5675^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 41002781 - 2² = 41002777 is a prime.

It is a super-2 number, since 2×41002781² = 3362456099467922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41002789) 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, 706916 + ... + 706973.

It is an arithmetic number, because the mean of its divisors is an integer number (10604175).

Almost surely, 2^41002781 is an apocalyptic number.

It is an amenable number.

41002781 is a deficient number, since it is larger than the sum of its proper divisors (1413919).

41002781 is a wasteful number, since it uses less digits than its factorization.

41002781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413918.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 41002781 is about 6403.3413933664. The cubic root of 41002781 is about 344.8295201971.

Adding to 41002781 its reverse (18720014), we get a palindrome (59722795).

The spelling of 41002781 in words is "forty-one million, two thousand, seven hundred eighty-one".