81467458 has 16 divisors (see below), whose sum is σ = 123298200. Its totient is φ = 40370176.

The previous prime is 81467429. The next prime is 81467479. The reversal of 81467458 is 85476418.

It can be written as a sum of positive squares in 4 ways, for example, as 81234169 + 233289 = 9013^2 + 483^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 181218 + ... + 181666.

Almost surely, 2^81467458 is an apocalyptic number.

81467458 is a deficient number, since it is larger than the sum of its proper divisors (41830742).

81467458 is a wasteful number, since it uses less digits than its factorization.

81467458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061.

The product of its digits is 215040, while the sum is 43.

The square root of 81467458 is about 9025.9325279995. The cubic root of 81467458 is about 433.5056097386.

The spelling of 81467458 in words is "eighty-one million, four hundred sixty-seven thousand, four hundred fifty-eight".