281421473 has 4 divisors (see below), whose sum is σ = 282993840. Its totient is φ = 279849108.

The previous prime is 281421457. The next prime is 281421527. The reversal of 281421473 is 374124182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 281421473 - 2⁴ = 281421457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281421403) by changing a digit.

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, 785915 + ... + 786272.

It is an arithmetic number, because the mean of its divisors is an integer number (70748460).

Almost surely, 2^281421473 is an apocalyptic number.

It is an amenable number.

281421473 is a deficient number, since it is larger than the sum of its proper divisors (1572367).

281421473 is a wasteful number, since it uses less digits than its factorization.

281421473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572366.

The product of its digits is 10752, while the sum is 32.

The square root of 281421473 is about 16775.6213893853. The cubic root of 281421473 is about 655.3184730241.

The spelling of 281421473 in words is "two hundred eighty-one million, four hundred twenty-one thousand, four hundred seventy-three".