2142169 has 2 divisors, whose sum is σ = 2142170. Its totient is φ = 2142168.

The previous prime is 2142167. The next prime is 2142181. The reversal of 2142169 is 9612412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2059225 + 82944 = 1435^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142169 - 2¹ = 2142167 is a prime.

It is a super-2 number, since 2×2142169² = 9177776049122, which contains 22 as substring.

Together with 2142167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2142163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071084 + 1071085.

It is an arithmetic number, because the mean of its divisors is an integer number (1071085).

2^2142169 is an apocalyptic number.

It is an amenable number.

2142169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142169 is an equidigital number, since it uses as much as digits as its factorization.

2142169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 2142169 is about 1463.6150450170. The cubic root of 2142169 is about 128.9093969492.

It can be divided in two parts, 214 and 2169, that multiplied together give a triangular number (464166 = T₉₆₃).

The spelling of 2142169 in words is "two million, one hundred forty-two thousand, one hundred sixty-nine".