281320972 has 12 divisors (see below), whose sum is σ = 492440200. Its totient is φ = 140623776.

The previous prime is 281320969. The next prime is 281320993. The reversal of 281320972 is 279023182.

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 3 ways as a sum of consecutive naturals, for example, 15343 + ... + 28249.

Almost surely, 2^281320972 is an apocalyptic number.

It is an amenable number.

281320972 is a deficient number, since it is larger than the sum of its proper divisors (211119228).

281320972 is a wasteful number, since it uses less digits than its factorization.

281320972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18360 (or 18358 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 281320972 is about 16772.6256739963. The cubic root of 281320972 is about 655.2404548086.

The spelling of 281320972 in words is "two hundred eighty-one million, three hundred twenty thousand, nine hundred seventy-two".