81029041 has 2 divisors, whose sum is σ = 81029042. Its totient is φ = 81029040.

The previous prime is 81029027. The next prime is 81029059. The reversal of 81029041 is 14092018.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68807025 + 12222016 = 8295^2 + 3496^2 .

It is a cyclic number.

It is not a de Polignac number, because 81029041 - 2²¹ = 78931889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81028997 and 81029015.

It is not a weakly prime, because it can be changed into another prime (81029141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40514520 + 40514521.

It is an arithmetic number, because the mean of its divisors is an integer number (40514521).

Almost surely, 2^81029041 is an apocalyptic number.

It is an amenable number.

81029041 is a deficient number, since it is larger than the sum of its proper divisors (1).

81029041 is an equidigital number, since it uses as much as digits as its factorization.

81029041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 81029041 is about 9001.6132443024. The cubic root of 81029041 is about 432.7265740122.

It can be divided in two parts, 8 and 1029041, that multiplied together give a palindrome (8232328).

The spelling of 81029041 in words is "eighty-one million, twenty-nine thousand, forty-one".