451009 has 4 divisors (see below), whose sum is σ = 485716. Its totient is φ = 416304.

The previous prime is 450997. The next prime is 451013. The reversal of 451009 is 900154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900154 = 2 ⋅450077.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 278784 = 415^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 451009 - 2⁷ = 450881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451039) 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, 17334 + ... + 17359.

It is an arithmetic number, because the mean of its divisors is an integer number (121429).

2⁴⁵¹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

451009 is a deficient number, since it is larger than the sum of its proper divisors (34707).

451009 is a wasteful number, since it uses less digits than its factorization.

451009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34706.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 451009 is about 671.5720363446. The cubic root of 451009 is about 76.6881750198.

The spelling of 451009 in words is "four hundred fifty-one thousand, nine".