2109642 has 16 divisors (see below), whose sum is σ = 4309632. Its totient is φ = 688160.

The previous prime is 2109641. The next prime is 2109647. The reversal of 2109642 is 2469012.

It is not an unprimeable number, because it can be changed into a prime (2109641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3459 + ... + 4022.

It is an arithmetic number, because the mean of its divisors is an integer number (269352).

2^2109642 is an apocalyptic number.

2109642 is an abundant number, since it is smaller than the sum of its proper divisors (2199990).

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

2109642 is a wasteful number, since it uses less digits than its factorization.

2109642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7533.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2109642 is about 1452.4606707240. The cubic root of 2109642 is about 128.2536068963.

The spelling of 2109642 in words is "two million, one hundred nine thousand, six hundred forty-two".