2181427 has 8 divisors (see below), whose sum is σ = 2255040. Its totient is φ = 2109120.

The previous prime is 2181419. The next prime is 2181449. The reversal of 2181427 is 7241812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2181427 - 2³ = 2181419 is a prime.

It is a Duffinian number.

2181427 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2181227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3927 + ... + 4447.

It is an arithmetic number, because the mean of its divisors is an integer number (281880).

2^2181427 is an apocalyptic number.

2181427 is a deficient number, since it is larger than the sum of its proper divisors (73613).

2181427 is an equidigital number, since it uses as much as digits as its factorization.

2181427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653.

The product of its digits is 896, while the sum is 25.

The square root of 2181427 is about 1476.9654701448. The cubic root of 2181427 is about 129.6921116181.

The spelling of 2181427 in words is "two million, one hundred eighty-one thousand, four hundred twenty-seven".