2181267 has 18 divisors (see below), whose sum is σ = 3464916. Its totient is φ = 1321320.

The previous prime is 2181259. The next prime is 2181271. The reversal of 2181267 is 7621812.

It is not a de Polignac number, because 2181267 - 2³ = 2181259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2181267.

It is not an unprimeable number, because it can be changed into a prime (2181217) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 88 + ... + 2090.

2^2181267 is an apocalyptic number.

2181267 is a deficient number, since it is larger than the sum of its proper divisors (1283649).

2181267 is a wasteful number, since it uses less digits than its factorization.

2181267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2017 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2181267 is about 1476.9113040396. The cubic root of 2181267 is about 129.6889407204.

It can be divided in two parts, 218 and 1267, that added together give a triangular number (1485 = T₅₄).

The spelling of 2181267 in words is "two million, one hundred eighty-one thousand, two hundred sixty-seven".