84451 has 4 divisors (see below), whose sum is σ = 85600. Its totient is φ = 83304.

The previous prime is 84449. The next prime is 84457. The reversal of 84451 is 15448.

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 84451 - 2¹ = 84449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84457) 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, 456 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (21400).

2⁸⁴⁴⁵¹ is an apocalyptic number.

84451 is a deficient number, since it is larger than the sum of its proper divisors (1149).

84451 is a wasteful number, since it uses less digits than its factorization.

84451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 640, while the sum is 22.

The square root of 84451 is about 290.6045422907. The cubic root of 84451 is about 43.8734310308.

Adding to 84451 its reverse (15448), we get a palindrome (99899).

It can be divided in two parts, 84 and 451, that added together give a palindrome (535).

The spelling of 84451 in words is "eighty-four thousand, four hundred fifty-one".