2943921 has 8 divisors (see below), whose sum is σ = 3989824. Its totient is φ = 1930320.

The previous prime is 2943911. The next prime is 2943929. The reversal of 2943921 is 1293492.

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

It is not a de Polignac number, because 2943921 - 2¹³ = 2935729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2943929) 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, 7861 + ... + 8226.

It is an arithmetic number, because the mean of its divisors is an integer number (498728).

2^2943921 is an apocalyptic number.

It is an amenable number.

2943921 is a deficient number, since it is larger than the sum of its proper divisors (1045903).

2943921 is a wasteful number, since it uses less digits than its factorization.

2943921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16151.

The product of its digits is 3888, while the sum is 30.

The square root of 2943921 is about 1715.7858257953. The cubic root of 2943921 is about 143.3206328510.

Adding to 2943921 its sum of digits (30), we get a triangular number (2943951 = T₂₄₂₆).

The spelling of 2943921 in words is "two million, nine hundred forty-three thousand, nine hundred twenty-one".