81025067 has 8 divisors (see below), whose sum is σ = 84990624. Its totient is φ = 77096448.

The previous prime is 81025037. The next prime is 81025093. The reversal of 81025067 is 76052018.

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

It is a cyclic number.

It is not a de Polignac number, because 81025067 - 2¹² = 81020971 is a prime.

It is a super-2 number, since 2×81025067² = 13130122964708978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81025027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4688 + ... + 13565.

It is an arithmetic number, because the mean of its divisors is an integer number (10623828).

Almost surely, 2^81025067 is an apocalyptic number.

81025067 is a deficient number, since it is larger than the sum of its proper divisors (3965557).

81025067 is a wasteful number, since it uses less digits than its factorization.

81025067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18469.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 81025067 is about 9001.3925033852. The cubic root of 81025067 is about 432.7194996616.

The spelling of 81025067 in words is "eighty-one million, twenty-five thousand, sixty-seven".