2718921 has 8 divisors (see below), whose sum is σ = 3634624. Its totient is φ = 1807920.

The previous prime is 2718907. The next prime is 2718931. The reversal of 2718921 is 1298172.

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

It is not a de Polignac number, because 2718921 - 2⁵ = 2718889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2718901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531 + ... + 2391.

It is an arithmetic number, because the mean of its divisors is an integer number (454328).

2^2718921 is an apocalyptic number.

It is an amenable number.

2718921 is a deficient number, since it is larger than the sum of its proper divisors (915703).

2718921 is a wasteful number, since it uses less digits than its factorization.

2718921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351.

The product of its digits is 2016, while the sum is 30.

The square root of 2718921 is about 1648.9150978750. The cubic root of 2718921 is about 139.5721803717.

The spelling of 2718921 in words is "two million, seven hundred eighteen thousand, nine hundred twenty-one".