281001045 has 16 divisors (see below), whose sum is σ = 484186752. Its totient is φ = 138338880.

The previous prime is 281001043. The next prime is 281001053. The reversal of 281001045 is 540100182.

It is not a de Polignac number, because 281001045 - 2¹ = 281001043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281001043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720321 + ... + 720710.

It is an arithmetic number, because the mean of its divisors is an integer number (30261672).

Almost surely, 2^281001045 is an apocalyptic number.

It is an amenable number.

281001045 is a deficient number, since it is larger than the sum of its proper divisors (203185707).

281001045 is a wasteful number, since it uses less digits than its factorization.

281001045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441052.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 281001045 is about 16763.0857839480. The cubic root of 281001045 is about 654.9919739513.

The spelling of 281001045 in words is "two hundred eighty-one million, one thousand, forty-five".