69121 has 6 divisors (see below), whose sum is σ = 75030. Its totient is φ = 63648.

The previous prime is 69119. The next prime is 69127. The reversal of 69121 is 12196.

69121 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 3 ways, for example, as 4096 + 65025 = 64^2 + 255^2 .

It is not a de Polignac number, because 69121 - 2¹ = 69119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36 + ... + 373.

It is an arithmetic number, because the mean of its divisors is an integer number (12505).

It is a Proth number, since it is equal to 135 ⋅ 2⁹ + 1 and 135 < 2⁹.

2⁶⁹¹²¹ is an apocalyptic number.

It is an amenable number.

69121 is a deficient number, since it is larger than the sum of its proper divisors (5909).

69121 is a wasteful number, since it uses less digits than its factorization.

69121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 422 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

The square root of 69121 is about 262.9087294100. The cubic root of 69121 is about 41.0396206332.

It can be divided in two parts, 69 and 121, that added together give a triangular number (190 = T₁₉).

The spelling of 69121 in words is "sixty-nine thousand, one hundred twenty-one".