2181246 has 8 divisors (see below), whose sum is σ = 4362504. Its totient is φ = 727080.

The previous prime is 2181233. The next prime is 2181247. The reversal of 2181246 is 6421812.

It is a sphenic number, since it is the product of 3 distinct primes.

2181246 is an admirable number.

It is a super-2 number, since 2×2181246² = 9515668225032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181765 + ... + 181776.

It is an arithmetic number, because the mean of its divisors is an integer number (545313).

2^2181246 is an apocalyptic number.

2181246 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2181246 is a wasteful number, since it uses less digits than its factorization.

2181246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363546.

The product of its digits is 768, while the sum is 24.

The square root of 2181246 is about 1476.9041945908. The cubic root of 2181246 is about 129.6885245286.

It can be divided in two parts, 218124 and 6, that added together give a triangular number (218130 = T₆₆₀).

The spelling of 2181246 in words is "two million, one hundred eighty-one thousand, two hundred forty-six".