81061254 has 12 divisors (see below), whose sum is σ = 175632756. Its totient is φ = 27020412.

The previous prime is 81061247. The next prime is 81061259. The reversal of 81061254 is 45216018.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81061259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2251684 + ... + 2251719.

It is an arithmetic number, because the mean of its divisors is an integer number (14636063).

Almost surely, 2^81061254 is an apocalyptic number.

81061254 is an abundant number, since it is smaller than the sum of its proper divisors (94571502).

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

81061254 is a wasteful number, since it uses less digits than its factorization.

81061254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503411 (or 4503408 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 81061254 is about 9003.4023568871. The cubic root of 81061254 is about 432.7839097285.

The spelling of 81061254 in words is "eighty-one million, sixty-one thousand, two hundred fifty-four".