81412354 has 8 divisors (see below), whose sum is σ = 129302028. Its totient is φ = 38311680.

The previous prime is 81412351. The next prime is 81412379. The reversal of 81412354 is 45321418.

It can be written as a sum of positive squares in 2 ways, for example, as 81270225 + 142129 = 9015^2 + 377^2 .

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

It is not an unprimeable number, because it can be changed into a prime (81412351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197207 + ... + 1197274.

Almost surely, 2^81412354 is an apocalyptic number.

81412354 is a deficient number, since it is larger than the sum of its proper divisors (47889674).

81412354 is a wasteful number, since it uses less digits than its factorization.

81412354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394500.

The product of its digits is 3840, while the sum is 28.

The square root of 81412354 is about 9022.8794738709. The cubic root of 81412354 is about 433.4078476726.

The spelling of 81412354 in words is "eighty-one million, four hundred twelve thousand, three hundred fifty-four".