41251681 has 2 divisors, whose sum is σ = 41251682. Its totient is φ = 41251680.

The previous prime is 41251657. The next prime is 41251687. The reversal of 41251681 is 18615214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41075281 + 176400 = 6409^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 41251681 - 2¹⁷ = 41120609 is a prime.

It is a super-2 number, since 2×41251681² = 3403402370651522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (41251687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20625840 + 20625841.

It is an arithmetic number, because the mean of its divisors is an integer number (20625841).

Almost surely, 2^41251681 is an apocalyptic number.

It is an amenable number.

41251681 is a deficient number, since it is larger than the sum of its proper divisors (1).

41251681 is an equidigital number, since it uses as much as digits as its factorization.

41251681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 41251681 is about 6422.7471536719. The cubic root of 41251681 is about 345.5258549404.

Adding to 41251681 its reverse (18615214), we get a palindrome (59866895).

The spelling of 41251681 in words is "forty-one million, two hundred fifty-one thousand, six hundred eighty-one".