2181474 has 24 divisors (see below), whose sum is σ = 5005260. Its totient is φ = 684288.

The previous prime is 2181469. The next prime is 2181503. The reversal of 2181474 is 4741812.

It can be written as a sum of positive squares in 2 ways, for example, as 2082249 + 99225 = 1443^2 + 315^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3259 + ... + 3870.

2^2181474 is an apocalyptic number.

2181474 is an abundant number, since it is smaller than the sum of its proper divisors (2823786).

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

2181474 is a wasteful number, since it uses less digits than its factorization.

2181474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154 (or 7151 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 2181474 is about 1476.9813810607. The cubic root of 2181474 is about 129.6930430398.

It can be divided in two parts, 2 and 181474, that added together give a square (181476 = 426²).

The spelling of 2181474 in words is "two million, one hundred eighty-one thousand, four hundred seventy-four".