81725034 has 8 divisors (see below), whose sum is σ = 163450080. Its totient is φ = 27241676.

The previous prime is 81725009. The next prime is 81725071. The reversal of 81725034 is 43052718.

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

81725034 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 81724992 and 81725010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6810414 + ... + 6810425.

It is an arithmetic number, because the mean of its divisors is an integer number (20431260).

Almost surely, 2^81725034 is an apocalyptic number.

81725034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81725034 is a wasteful number, since it uses less digits than its factorization.

81725034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13620844.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 81725034 is about 9040.1899316331. The cubic root of 81725034 is about 433.9620012460.

The spelling of 81725034 in words is "eighty-one million, seven hundred twenty-five thousand, thirty-four".