2942921 has 8 divisors (see below), whose sum is σ = 3131424. Its totient is φ = 2756160.

The previous prime is 2942909. The next prime is 2942959. The reversal of 2942921 is 1292492.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2942921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2942981) 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, 5366 + ... + 5888.

It is an arithmetic number, because the mean of its divisors is an integer number (391428).

2^2942921 is an apocalyptic number.

It is an amenable number.

2942921 is a deficient number, since it is larger than the sum of its proper divisors (188503).

2942921 is a wasteful number, since it uses less digits than its factorization.

2942921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871.

The product of its digits is 2592, while the sum is 29.

The square root of 2942921 is about 1715.4943893817. The cubic root of 2942921 is about 143.3044031510.

The spelling of 2942921 in words is "two million, nine hundred forty-two thousand, nine hundred twenty-one".