81468245 has 16 divisors (see below), whose sum is σ = 100172160. Its totient is φ = 63585600.

The previous prime is 81468241. The next prime is 81468251. The reversal of 81468245 is 54286418.

It is a happy number.

It is not a de Polignac number, because 81468245 - 2² = 81468241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81468199 and 81468208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81468241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38936 + ... + 40974.

It is an arithmetic number, because the mean of its divisors is an integer number (6260760).

Almost surely, 2^81468245 is an apocalyptic number.

It is an amenable number.

81468245 is a deficient number, since it is larger than the sum of its proper divisors (18703915).

81468245 is a wasteful number, since it uses less digits than its factorization.

81468245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236.

The product of its digits is 61440, while the sum is 38.

The square root of 81468245 is about 9025.9761244976. The cubic root of 81468245 is about 433.5070056653.

The spelling of 81468245 in words is "eighty-one million, four hundred sixty-eight thousand, two hundred forty-five".