1942009 has 8 divisors (see below), whose sum is σ = 2092640. Its totient is φ = 1796256.

The previous prime is 1942007. The next prime is 1942021. The reversal of 1942009 is 9002491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1942009 - 2¹ = 1942007 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372 + ... + 2005.

It is an arithmetic number, because the mean of its divisors is an integer number (261580).

2^1942009 is an apocalyptic number.

1942009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1942009 is a deficient number, since it is larger than the sum of its proper divisors (150631).

1942009 is a wasteful number, since it uses less digits than its factorization.

1942009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1942009 is about 1393.5598300755. The cubic root of 1942009 is about 124.7624073507.

The spelling of 1942009 in words is "one million, nine hundred forty-two thousand, nine".