281265872 has 20 divisors (see below), whose sum is σ = 546425220. Its totient is φ = 140252928.

The previous prime is 281265851. The next prime is 281265877. The reversal of 281265872 is 278562182.

281265872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47665216 + 233600656 = 6904^2 + 15284^2 .

It is a super-2 number, since 2×281265872² = 158220981503840768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281265877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17597 + ... + 29532.

It is an arithmetic number, because the mean of its divisors is an integer number (27321261).

Almost surely, 2^281265872 is an apocalyptic number.

It is an amenable number.

281265872 is a deficient number, since it is larger than the sum of its proper divisors (265159348).

281265872 is a wasteful number, since it uses less digits than its factorization.

281265872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47510 (or 47504 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 281265872 is about 16770.9830361848. The cubic root of 281265872 is about 655.1976731818.

The spelling of 281265872 in words is "two hundred eighty-one million, two hundred sixty-five thousand, eight hundred seventy-two".