21062 has 4 divisors (see below), whose sum is σ = 31596. Its totient is φ = 10530.

The previous prime is 21061. The next prime is 21067. The reversal of 21062 is 26012.

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

It is a zygodrome in base 5.

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 21062.

It is not an unprimeable number, because it can be changed into a prime (21061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5264 + ... + 5267.

It is an arithmetic number, because the mean of its divisors is an integer number (7899).

2²¹⁰⁶² is an apocalyptic number.

21062 is a deficient number, since it is larger than the sum of its proper divisors (10534).

21062 is a wasteful number, since it uses less digits than its factorization.

21062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10533.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21062 is about 145.1275301244. The cubic root of 21062 is about 27.6163664045.

Adding to 21062 its reverse (26012), we get a palindrome (47074).

Subtracting 21062 from its reverse (26012), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 210 and 62, that added together give a palindrome (272).

The spelling of 21062 in words is "twenty-one thousand, sixty-two".