2715921 has 24 divisors (see below), whose sum is σ = 4280640. Its totient is φ = 1649376.

The previous prime is 2715913. The next prime is 2715929. The reversal of 2715921 is 1295172.

2715921 is a `hidden beast` number, since 2 + 71 + 592 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2715913) and next prime (2715929).

It is not a de Polignac number, because 2715921 - 2³ = 2715913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2715929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16180 + ... + 16346.

It is an arithmetic number, because the mean of its divisors is an integer number (178360).

2^2715921 is an apocalyptic number.

It is an amenable number.

2715921 is a deficient number, since it is larger than the sum of its proper divisors (1564719).

2715921 is a wasteful number, since it uses less digits than its factorization.

2715921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 322 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 2715921 is about 1648.0051577589. The cubic root of 2715921 is about 139.5208278148.

The spelling of 2715921 in words is "two million, seven hundred fifteen thousand, nine hundred twenty-one".