81254268 has 36 divisors (see below), whose sum is σ = 207287080. Its totient is φ = 26834976.

The previous prime is 81254267. The next prime is 81254291. The reversal of 81254268 is 86245218.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81254267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6430 + ... + 14277.

Almost surely, 2^81254268 is an apocalyptic number.

It is an amenable number.

81254268 is an abundant number, since it is smaller than the sum of its proper divisors (126032812).

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

81254268 is a wasteful number, since it uses less digits than its factorization.

81254268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20826 (or 20821 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 81254268 is about 9014.1149315948. The cubic root of 81254268 is about 433.1271363500.

The spelling of 81254268 in words is "eighty-one million, two hundred fifty-four thousand, two hundred sixty-eight".