81292246 has 16 divisors (see below), whose sum is σ = 139529376. Its totient is φ = 34796736.

The previous prime is 81292243. The next prime is 81292259. The reversal of 81292246 is 64229218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81292243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10020 + ... + 16216.

It is an arithmetic number, because the mean of its divisors is an integer number (8720586).

Almost surely, 2^81292246 is an apocalyptic number.

81292246 is a deficient number, since it is larger than the sum of its proper divisors (58237130).

81292246 is a wasteful number, since it uses less digits than its factorization.

81292246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143.

The product of its digits is 13824, while the sum is 34.

The square root of 81292246 is about 9016.2212705767. The cubic root of 81292246 is about 433.1946066120.

The spelling of 81292246 in words is "eighty-one million, two hundred ninety-two thousand, two hundred forty-six".