451281 has 4 divisors (see below), whose sum is σ = 601712. Its totient is φ = 300852.

The previous prime is 451279. The next prime is 451301. The reversal of 451281 is 182154.

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 not a de Polignac number, because 451281 - 2¹ = 451279 is a prime.

It is a super-2 number, since 2×451281² = 407309081922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 451281.

It is not an unprimeable number, because it can be changed into a prime (451201) 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, 75211 + ... + 75216.

It is an arithmetic number, because the mean of its divisors is an integer number (150428).

2⁴⁵¹²⁸¹ is an apocalyptic number.

It is an amenable number.

451281 is a deficient number, since it is larger than the sum of its proper divisors (150431).

451281 is a wasteful number, since it uses less digits than its factorization.

451281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150430.

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

The square root of 451281 is about 671.7745157417. The cubic root of 451281 is about 76.7035886011.

It can be divided in two parts, 45 and 1281, that added together give a triangular number (1326 = T₅₁).

The spelling of 451281 in words is "four hundred fifty-one thousand, two hundred eighty-one".