81942246 has 16 divisors (see below), whose sum is σ = 182094000. Its totient is φ = 27314064.

The previous prime is 81942239. The next prime is 81942251. The reversal of 81942246 is 64224918.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81942246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758671 + ... + 758778.

It is an arithmetic number, because the mean of its divisors is an integer number (11380875).

Almost surely, 2^81942246 is an apocalyptic number.

81942246 is an abundant number, since it is smaller than the sum of its proper divisors (100151754).

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

81942246 is a wasteful number, since it uses less digits than its factorization.

81942246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517460 (or 1517454 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 81942246 is about 9052.1956452565. The cubic root of 81942246 is about 434.3461282054.

It can be divided in two parts, 8194 and 2246, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 81942246 in words is "eighty-one million, nine hundred forty-two thousand, two hundred forty-six".