81454234 has 8 divisors (see below), whose sum is σ = 122233428. Its totient is φ = 40709760.

The previous prime is 81454231. The next prime is 81454271. The reversal of 81454234 is 43245418.

It can be written as a sum of positive squares in 2 ways, for example, as 71825625 + 9628609 = 8475^2 + 3103^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 81454196 and 81454205.

It is not an unprimeable number, because it can be changed into a prime (81454231) 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, 1687 + ... + 12874.

Almost surely, 2^81454234 is an apocalyptic number.

81454234 is a deficient number, since it is larger than the sum of its proper divisors (40779194).

81454234 is a wasteful number, since it uses less digits than its factorization.

81454234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17360.

The product of its digits is 15360, while the sum is 31.

The square root of 81454234 is about 9025.1999423835. The cubic root of 81454234 is about 433.4821525671.

The spelling of 81454234 in words is "eighty-one million, four hundred fifty-four thousand, two hundred thirty-four".