1942921 has 4 divisors (see below), whose sum is σ = 2045200. Its totient is φ = 1840644.

The previous prime is 1942909. The next prime is 1942939. The reversal of 1942921 is 1292491.

It is a happy number.

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.

It is not a de Polignac number, because 1942921 - 2⁷ = 1942793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1942921.

It is not an unprimeable number, because it can be changed into a prime (1942901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51111 + ... + 51148.

It is an arithmetic number, because the mean of its divisors is an integer number (511300).

2^1942921 is an apocalyptic number.

It is an amenable number.

1942921 is a deficient number, since it is larger than the sum of its proper divisors (102279).

1942921 is a wasteful number, since it uses less digits than its factorization.

1942921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102278.

The product of its digits is 1296, while the sum is 28.

The square root of 1942921 is about 1393.8870112028. The cubic root of 1942921 is about 124.7819344673.

The spelling of 1942921 in words is "one million, nine hundred forty-two thousand, nine hundred twenty-one".