2181492 has 30 divisors (see below), whose sum is σ = 5703698. Its totient is φ = 727056.

The previous prime is 2181469. The next prime is 2181503. The reversal of 2181492 is 2941812.

2181492 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2178576 + 2916 = 1476^2 + 54^2 .

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

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3043 + ... + 3690.

2^2181492 is an apocalyptic number.

It is an amenable number.

2181492 is an abundant number, since it is smaller than the sum of its proper divisors (3522206).

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

2181492 is a wasteful number, since it uses less digits than its factorization.

2181492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749 (or 6738 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 2181492 is about 1476.9874745576. The cubic root of 2181492 is about 129.6933997510.

The spelling of 2181492 in words is "two million, one hundred eighty-one thousand, four hundred ninety-two".