81025141 has 8 divisors (see below), whose sum is σ = 82637568. Its totient is φ = 79422000.

The previous prime is 81025127. The next prime is 81025163. The reversal of 81025141 is 14152018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81025141 - 2¹⁷ = 80894069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81025121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16836 + ... + 21106.

It is an arithmetic number, because the mean of its divisors is an integer number (10329696).

Almost surely, 2^81025141 is an apocalyptic number.

It is an amenable number.

81025141 is a deficient number, since it is larger than the sum of its proper divisors (1612427).

81025141 is a wasteful number, since it uses less digits than its factorization.

81025141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4643.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 81025141 is about 9001.3966138594. The cubic root of 81025141 is about 432.7196313955.

Adding to 81025141 its reverse (14152018), we get a palindrome (95177159).

The spelling of 81025141 in words is "eighty-one million, twenty-five thousand, one hundred forty-one".