69021 has 6 divisors (see below), whose sum is σ = 99710. Its totient is φ = 46008.

The previous prime is 69019. The next prime is 69029. The reversal of 69021 is 12096.

It can be written as a sum of positive squares in only one way, i.e., 68121 + 900 = 261^2 + 30^2 .

It is not a de Polignac number, because 69021 - 2¹ = 69019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68985 and 69003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3826 + ... + 3843.

2⁶⁹⁰²¹ is an apocalyptic number.

It is an amenable number.

69021 is a deficient number, since it is larger than the sum of its proper divisors (30689).

69021 is a wasteful number, since it uses less digits than its factorization.

69021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7675 (or 7672 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 69021 is about 262.7184805072. The cubic root of 69021 is about 41.0198198839.

It can be divided in two parts, 6902 and 1, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 69021 in words is "sixty-nine thousand, twenty-one".