2179842 has 64 divisors (see below), whose sum is σ = 5474304. Its totient is φ = 564480.

The previous prime is 2179831. The next prime is 2179867. The reversal of 2179842 is 2489712.

It is a happy number.

It is a super-2 number, since 2×2179842² = 9503422289928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30667 + ... + 30737.

It is an arithmetic number, because the mean of its divisors is an integer number (85536).

2^2179842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2179842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2737152).

2179842 is an abundant number, since it is smaller than the sum of its proper divisors (3294462).

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

2179842 is a wasteful number, since it uses less digits than its factorization.

2179842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143.

The product of its digits is 8064, while the sum is 33.

The square root of 2179842 is about 1476.4287995024. The cubic root of 2179842 is about 129.6606930706.

The spelling of 2179842 in words is "two million, one hundred seventy-nine thousand, eight hundred forty-two".