2091142 has 4 divisors (see below), whose sum is σ = 3136716. Its totient is φ = 1045570.

The previous prime is 2091139. The next prime is 2091149. The reversal of 2091142 is 2411902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2411902 = 2 ⋅1205951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522784 + ... + 522787.

It is an arithmetic number, because the mean of its divisors is an integer number (784179).

2^2091142 is an apocalyptic number.

2091142 is a deficient number, since it is larger than the sum of its proper divisors (1045574).

2091142 is a wasteful number, since it uses less digits than its factorization.

2091142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045573.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2091142 is about 1446.0781444998. The cubic root of 2091142 is about 127.8776092470.

The spelling of 2091142 in words is "two million, ninety-one thousand, one hundred forty-two".