2091242 has 4 divisors (see below), whose sum is σ = 3136866. Its totient is φ = 1045620.

The previous prime is 2091241. The next prime is 2091247. The reversal of 2091242 is 2421902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1819801 + 271441 = 1349^2 + 521^2 .

It is not an unprimeable number, because it can be changed into a prime (2091241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522809 + ... + 522812.

2^2091242 is an apocalyptic number.

2091242 is a deficient number, since it is larger than the sum of its proper divisors (1045624).

2091242 is a wasteful number, since it uses less digits than its factorization.

2091242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045623.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2091242 is about 1446.1127203645. The cubic root of 2091242 is about 127.8796476160.

The spelling of 2091242 in words is "two million, ninety-one thousand, two hundred forty-two".