281485001 has 4 divisors (see below), whose sum is σ = 321697152. Its totient is φ = 241272852.

The previous prime is 281484977. The next prime is 281485033. The reversal of 281485001 is 100584182.

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 281485001 - 2¹⁴ = 281468617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281485901) 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, 20106065 + ... + 20106078.

It is an arithmetic number, because the mean of its divisors is an integer number (80424288).

Almost surely, 2^281485001 is an apocalyptic number.

It is an amenable number.

281485001 is a deficient number, since it is larger than the sum of its proper divisors (40212151).

281485001 is an equidigital number, since it uses as much as digits as its factorization.

281485001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40212150.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 281485001 is about 16777.5147444429. The cubic root of 281485001 is about 655.3677797801.

The spelling of 281485001 in words is "two hundred eighty-one million, four hundred eighty-five thousand, one".