84621 has 8 divisors (see below), whose sum is σ = 114784. Its totient is φ = 55440.

The previous prime is 84589. The next prime is 84629. The reversal of 84621 is 12648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84621 - 2⁵ = 84589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84621.

It is not an unprimeable number, because it can be changed into a prime (84629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10 + ... + 411.

It is an arithmetic number, because the mean of its divisors is an integer number (14348).

2⁸⁴⁶²¹ is an apocalyptic number.

It is an amenable number.

84621 is a deficient number, since it is larger than the sum of its proper divisors (30163).

84621 is a wasteful number, since it uses less digits than its factorization.

84621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 384, while the sum is 21.

The square root of 84621 is about 290.8968889486. The cubic root of 84621 is about 43.9028503951.

It can be divided in two parts, 846 and 21, that multiplied together give a triangular number (17766 = T₁₈₈).

The spelling of 84621 in words is "eighty-four thousand, six hundred twenty-one".