451091 has 4 divisors (see below), whose sum is σ = 452832. Its totient is φ = 449352.

The previous prime is 451069. The next prime is 451093. The reversal of 451091 is 190154.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 451091 - 2¹⁰ = 450067 is a prime.

It is a deceptive number, since it divides R₄₅₁₀₉₀.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451093) 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, 395 + ... + 1028.

It is an arithmetic number, because the mean of its divisors is an integer number (113208).

2⁴⁵¹⁰⁹¹ is an apocalyptic number.

451091 is a deficient number, since it is larger than the sum of its proper divisors (1741).

451091 is a wasteful number, since it uses less digits than its factorization.

451091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 451091 is about 671.6330843548. The cubic root of 451091 is about 76.6928224136.

The spelling of 451091 in words is "four hundred fifty-one thousand, ninety-one".