1942109 has 4 divisors (see below), whose sum is σ = 2091516. Its totient is φ = 1792704.

The previous prime is 1942099. The next prime is 1942111. The reversal of 1942109 is 9012491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9012491 = 53 ⋅170047.

It can be written as a sum of positive squares in 2 ways, for example, as 1092025 + 850084 = 1045^2 + 922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1942109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74684 + ... + 74709.

It is an arithmetic number, because the mean of its divisors is an integer number (522879).

2^1942109 is an apocalyptic number.

It is an amenable number.

1942109 is a deficient number, since it is larger than the sum of its proper divisors (149407).

1942109 is a wasteful number, since it uses less digits than its factorization.

1942109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149406.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1942109 is about 1393.5957089486. The cubic root of 1942109 is about 124.7645487802.

The spelling of 1942109 in words is "one million, nine hundred forty-two thousand, one hundred nine".