281232001 has 4 divisors (see below), whose sum is σ = 281389104. Its totient is φ = 281074900.

The previous prime is 281231999. The next prime is 281232011. The reversal of 281232001 is 100232182.

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 281232001 - 2¹ = 281231999 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 281232001.

It is not an unprimeable number, because it can be changed into a prime (281232011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75835 + ... + 79456.

It is an arithmetic number, because the mean of its divisors is an integer number (70347276).

Almost surely, 2^281232001 is an apocalyptic number.

It is an amenable number.

281232001 is a deficient number, since it is larger than the sum of its proper divisors (157103).

281232001 is a wasteful number, since it uses less digits than its factorization.

281232001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157102.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 281232001 is about 16769.9731961622. The cubic root of 281232001 is about 655.1713717431.

Adding to 281232001 its reverse (100232182), we get a palindrome (381464183).

The spelling of 281232001 in words is "two hundred eighty-one million, two hundred thirty-two thousand, one".