169286121 has 9 divisors (see below), whose sum is σ = 244580791. Its totient is φ = 112831392.

The previous prime is 169286101. The next prime is 169286123. The reversal of 169286121 is 121682961.

The square root of 169286121 is 13011.

It is a perfect power (a square), and thus also a powerful number.

169286121 is a `hidden beast` number, since 16 + 9 + 28 + 612 + 1 = 666.

169286121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 167340096 = 1395^2 + 12936^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 169286121 - 2⁷ = 169285993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169286123) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36865 + ... + 41201.

Almost surely, 2^169286121 is an apocalyptic number.

169286121 is the 13011-st square number.

169286121 is the 6506-th centered octagonal number.

It is an amenable number.

169286121 is a deficient number, since it is larger than the sum of its proper divisors (75294670).

169286121 is an frugal number, since it uses more digits than its factorization.

169286121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8680 (or 4340 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The cubic root of 169286121 is about 553.1893170063.

Multiplying 169286121 by its sum of digits (36), we get a square (6094300356 = 78066²).

The spelling of 169286121 in words is "one hundred sixty-nine million, two hundred eighty-six thousand, one hundred twenty-one".