281361045 has 32 divisors (see below), whose sum is σ = 532235520. Its totient is φ = 124185600.

The previous prime is 281361043. The next prime is 281361049. The reversal of 281361045 is 540163182.

It is not a de Polignac number, because 281361045 - 2¹ = 281361043 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281361043) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 43156 + ... + 49245.

It is an arithmetic number, because the mean of its divisors is an integer number (16632360).

Almost surely, 2^281361045 is an apocalyptic number.

It is an amenable number.

281361045 is a deficient number, since it is larger than the sum of its proper divisors (250874475).

281361045 is a wasteful number, since it uses less digits than its factorization.

281361045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92445.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 281361045 is about 16773.8202267700. The cubic root of 281361045 is about 655.2715654221.

The spelling of 281361045 in words is "two hundred eighty-one million, three hundred sixty-one thousand, forty-five".