464821 has 4 divisors (see below), whose sum is σ = 531232. Its totient is φ = 398412.

The previous prime is 464819. The next prime is 464843. The reversal of 464821 is 128464.

464821 = 84² + 85² + ... + 125².

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 464821 - 2¹ = 464819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (464801) 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, 33195 + ... + 33208.

It is an arithmetic number, because the mean of its divisors is an integer number (132808).

2⁴⁶⁴⁸²¹ is an apocalyptic number.

It is an amenable number.

464821 is a deficient number, since it is larger than the sum of its proper divisors (66411).

464821 is an equidigital number, since it uses as much as digits as its factorization.

464821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66410.

The product of its digits is 1536, while the sum is 25.

The square root of 464821 is about 681.7778230479. Note that the first 3 decimals coincide. The cubic root of 464821 is about 77.4631666802.

The spelling of 464821 in words is "four hundred sixty-four thousand, eight hundred twenty-one".