281472145 has 8 divisors (see below), whose sum is σ = 357635304. Its totient is φ = 211931904.

The previous prime is 281472131. The next prime is 281472151. The reversal of 281472145 is 541274182.

It can be written as a sum of positive squares in 4 ways, for example, as 14737921 + 266734224 = 3839^2 + 16332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281472145 - 2⁷ = 281472017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 281472145.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1655634 + ... + 1655803.

It is an arithmetic number, because the mean of its divisors is an integer number (44704413).

Almost surely, 2^281472145 is an apocalyptic number.

It is an amenable number.

281472145 is a deficient number, since it is larger than the sum of its proper divisors (76163159).

281472145 is a wasteful number, since it uses less digits than its factorization.

281472145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311459.

The product of its digits is 17920, while the sum is 34.

The square root of 281472145 is about 16777.1316082339. The cubic root of 281472145 is about 655.3578022959.

The spelling of 281472145 in words is "two hundred eighty-one million, four hundred seventy-two thousand, one hundred forty-five".