2091942 has 48 divisors (see below), whose sum is σ = 4912128. Its totient is φ = 641520.

The previous prime is 2091931. The next prime is 2091953. The reversal of 2091942 is 2491902.

It is an interprime number because it is at equal distance from previous prime (2091931) and next prime (2091953).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12753 + ... + 12915.

It is an arithmetic number, because the mean of its divisors is an integer number (102336).

2^2091942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2456064).

2091942 is an abundant number, since it is smaller than the sum of its proper divisors (2820186).

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

2091942 is a wasteful number, since it uses less digits than its factorization.

2091942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2091942 is about 1446.3547282738. The cubic root of 2091942 is about 127.8939143798.

The spelling of 2091942 in words is "two million, ninety-one thousand, nine hundred forty-two".