81269043 has 8 divisors (see below), whose sum is σ = 108964800. Its totient is φ = 53876328.

The previous prime is 81269039. The next prime is 81269081. The reversal of 81269043 is 34096218.

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

It is not a de Polignac number, because 81269043 - 2² = 81269039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81268995 and 81269013.

It is not an unprimeable number, because it can be changed into a prime (81269003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75133 + ... + 76206.

It is an arithmetic number, because the mean of its divisors is an integer number (13620600).

Almost surely, 2^81269043 is an apocalyptic number.

81269043 is a deficient number, since it is larger than the sum of its proper divisors (27695757).

81269043 is a wasteful number, since it uses less digits than its factorization.

81269043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151521.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 81269043 is about 9014.9344423573. The cubic root of 81269043 is about 433.1533875478.

The spelling of 81269043 in words is "eighty-one million, two hundred sixty-nine thousand, forty-three".