41245781 has 2 divisors, whose sum is σ = 41245782. Its totient is φ = 41245780.

The previous prime is 41245769. The next prime is 41245793. The reversal of 41245781 is 18754214.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (41245769) and next prime (41245793).

It can be written as a sum of positive squares in only one way, i.e., 31820881 + 9424900 = 5641^2 + 3070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41245781 is a prime.

It is a super-2 number, since 2×41245781² = 3402428900599922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_2504786 and since 41245781 and 2504786 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41245741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20622890 + 20622891.

It is an arithmetic number, because the mean of its divisors is an integer number (20622891).

Almost surely, 2^41245781 is an apocalyptic number.

It is an amenable number.

41245781 is a deficient number, since it is larger than the sum of its proper divisors (1).

41245781 is an equidigital number, since it uses as much as digits as its factorization.

41245781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 41245781 is about 6422.2878322293. The cubic root of 41245781 is about 345.5093812704.

Subtracting from 41245781 its product of digits (8960), we obtain a triangular number (41236821 = T₉₀₈₁).

Adding to 41245781 its reverse (18754214), we get a palindrome (59999995).

The spelling of 41245781 in words is "forty-one million, two hundred forty-five thousand, seven hundred eighty-one".