462821 has 4 divisors (see below), whose sum is σ = 487200. Its totient is φ = 438444.

The previous prime is 462773. The next prime is 462827. The reversal of 462821 is 128264.

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 a de Polignac number, because none of the positive numbers 2^k-462821 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 (462827) 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, 12161 + ... + 12198.

It is an arithmetic number, because the mean of its divisors is an integer number (121800).

2⁴⁶²⁸²¹ is an apocalyptic number.

It is an amenable number.

462821 is a deficient number, since it is larger than the sum of its proper divisors (24379).

462821 is a wasteful number, since it uses less digits than its factorization.

462821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24378.

The product of its digits is 768, while the sum is 23.

The square root of 462821 is about 680.3094883948. The cubic root of 462821 is about 77.3519058807.

The spelling of 462821 in words is "four hundred sixty-two thousand, eight hundred twenty-one".