942209 has 4 divisors (see below), whose sum is σ = 962304. Its totient is φ = 922116.

The previous prime is 942199. The next prime is 942217. The reversal of 942209 is 902249.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902249 = 139 ⋅6491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-942209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (942269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9977 + ... + 10070.

It is an arithmetic number, because the mean of its divisors is an integer number (240576).

2⁹⁴²²⁰⁹ is an apocalyptic number.

It is an amenable number.

942209 is a deficient number, since it is larger than the sum of its proper divisors (20095).

942209 is a wasteful number, since it uses less digits than its factorization.

942209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20094.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 942209 is about 970.6745077522. The cubic root of 942209 is about 98.0352850866.

It can be divided in two parts, 942 and 209, that multiplied together give a triangular number (196878 = T₆₂₇).

The spelling of 942209 in words is "nine hundred forty-two thousand, two hundred nine".