81025035 has 32 divisors (see below), whose sum is σ = 159559680. Its totient is φ = 34190208.

The previous prime is 81025033. The next prime is 81025037. The reversal of 81025035 is 53052018.

It is an interprime number because it is at equal distance from previous prime (81025033) and next prime (81025037).

It is not a de Polignac number, because 81025035 - 2¹ = 81025033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81024996 and 81025014.

It is not an unprimeable number, because it can be changed into a prime (81025033) 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 31 ways as a sum of consecutive naturals, for example, 28315 + ... + 31044.

It is an arithmetic number, because the mean of its divisors is an integer number (4986240).

Almost surely, 2^81025035 is an apocalyptic number.

81025035 is a deficient number, since it is larger than the sum of its proper divisors (78534645).

81025035 is a wasteful number, since it uses less digits than its factorization.

81025035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59387.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 81025035 is about 9001.3907258823. The cubic root of 81025035 is about 432.7194426956.

The spelling of 81025035 in words is "eighty-one million, twenty-five thousand, thirty-five".