2161269 has 32 divisors (see below), whose sum is σ = 3686400. Its totient is φ = 1237680.

The previous prime is 2161259. The next prime is 2161279. The reversal of 2161269 is 9621612.

It is an interprime number because it is at equal distance from previous prime (2161259) and next prime (2161279).

It is not a de Polignac number, because 2161269 - 2⁴ = 2161253 is a prime.

It is a super-2 number, since 2×2161269² = 9342167380722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5452 + ... + 5834.

It is an arithmetic number, because the mean of its divisors is an integer number (115200).

2^2161269 is an apocalyptic number.

It is an amenable number.

2161269 is a deficient number, since it is larger than the sum of its proper divisors (1525131).

2161269 is a wasteful number, since it uses less digits than its factorization.

2161269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 416 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 2161269 is about 1470.1255048464. The cubic root of 2161269 is about 129.2913910537.

It can be divided in two parts, 216 and 1269, that added together give a triangular number (1485 = T₅₄).

The spelling of 2161269 in words is "two million, one hundred sixty-one thousand, two hundred sixty-nine".