2189742 has 16 divisors (see below), whose sum is σ = 4408320. Its totient is φ = 725112.

The previous prime is 2189741. The next prime is 2189743. The reversal of 2189742 is 2479812.

It is a happy number.

2189742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2189741) and next prime (2189743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 2097.

It is an arithmetic number, because the mean of its divisors is an integer number (275520).

2^2189742 is an apocalyptic number.

2189742 is an abundant number, since it is smaller than the sum of its proper divisors (2218578).

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

2189742 is a wasteful number, since it uses less digits than its factorization.

2189742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407.

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

The square root of 2189742 is about 1479.7776860056. Note that the first 3 decimals coincide. The cubic root of 2189742 is about 129.8566862485.

The spelling of 2189742 in words is "two million, one hundred eighty-nine thousand, seven hundred forty-two".