81254148 has 24 divisors (see below), whose sum is σ = 190337952. Its totient is φ = 26978304.

The previous prime is 81254123. The next prime is 81254149. The reversal of 81254148 is 84145218.

It is not an unprimeable number, because it can be changed into a prime (81254149) 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, 10090 + ... + 16257.

It is an arithmetic number, because the mean of its divisors is an integer number (7930748).

Almost surely, 2^81254148 is an apocalyptic number.

It is an amenable number.

81254148 is an abundant number, since it is smaller than the sum of its proper divisors (109083804).

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

81254148 is a wasteful number, since it uses less digits than its factorization.

81254148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26611 (or 26609 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 81254148 is about 9014.1082753648. The cubic root of 81254148 is about 433.1269231292.

The spelling of 81254148 in words is "eighty-one million, two hundred fifty-four thousand, one hundred forty-eight".