2181486 has 8 divisors (see below), whose sum is σ = 4362984. Its totient is φ = 727160.

The previous prime is 2181469. The next prime is 2181503. The reversal of 2181486 is 6841812.

It is an interprime number because it is at equal distance from previous prime (2181469) and next prime (2181503).

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

2181486 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181785 + ... + 181796.

It is an arithmetic number, because the mean of its divisors is an integer number (545373).

2^2181486 is an apocalyptic number.

2181486 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.

2181486 is a wasteful number, since it uses less digits than its factorization.

2181486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363586.

The product of its digits is 3072, while the sum is 30.

The square root of 2181486 is about 1476.9854433948. The cubic root of 2181486 is about 129.6932808475.

The spelling of 2181486 in words is "two million, one hundred eighty-one thousand, four hundred eighty-six".