281172140 has 24 divisors (see below), whose sum is σ = 591312960. Its totient is φ = 112306688.

The previous prime is 281172131. The next prime is 281172161. The reversal of 281172140 is 41271182.

It is an unprimeable number.

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, 4604 + ... + 24156.

It is an arithmetic number, because the mean of its divisors is an integer number (24638040).

Almost surely, 2^281172140 is an apocalyptic number.

281172140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281172140 is an abundant number, since it is smaller than the sum of its proper divisors (310140820).

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

281172140 is a wasteful number, since it uses less digits than its factorization.

281172140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20281 (or 20279 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 281172140 is about 16768.1883338660. The cubic root of 281172140 is about 655.1248834389.

The spelling of 281172140 in words is "two hundred eighty-one million, one hundred seventy-two thousand, one hundred forty".