2181494 has 8 divisors (see below), whose sum is σ = 3739728. Its totient is φ = 934920.

The previous prime is 2181469. The next prime is 2181503. The reversal of 2181494 is 4941812.

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

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

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, 77897 + ... + 77924.

It is an arithmetic number, because the mean of its divisors is an integer number (467466).

2^2181494 is an apocalyptic number.

2181494 is a deficient number, since it is larger than the sum of its proper divisors (1558234).

2181494 is a wasteful number, since it uses less digits than its factorization.

2181494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155830.

The product of its digits is 2304, while the sum is 29.

The square root of 2181494 is about 1476.9881516112. The cubic root of 2181494 is about 129.6934393854.

The spelling of 2181494 in words is "two million, one hundred eighty-one thousand, four hundred ninety-four".