41980781 has 4 divisors (see below), whose sum is σ = 42198492. Its totient is φ = 41763072.

The previous prime is 41980759. The next prime is 41980817. The reversal of 41980781 is 18708914.

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 29800681 + 12180100 = 5459^2 + 3490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41980781 is a prime.

It is a super-2 number, since 2×41980781² = 3524771946739922, 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 (41980711) 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, 108566 + ... + 108951.

It is an arithmetic number, because the mean of its divisors is an integer number (10549623).

Almost surely, 2^41980781 is an apocalyptic number.

It is an amenable number.

41980781 is a deficient number, since it is larger than the sum of its proper divisors (217711).

41980781 is a wasteful number, since it uses less digits than its factorization.

41980781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217710.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 41980781 is about 6479.2577506995. The cubic root of 41980781 is about 347.5496359579.

The spelling of 41980781 in words is "forty-one million, nine hundred eighty thousand, seven hundred eighty-one".