2721456 has 30 divisors (see below), whose sum is σ = 7616700. Its totient is φ = 907104.

The previous prime is 2721451. The next prime is 2721517. The reversal of 2721456 is 6541272.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2721451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9306 + ... + 9593.

It is an arithmetic number, because the mean of its divisors is an integer number (253890).

2^2721456 is an apocalyptic number.

It is an amenable number.

2721456 is an abundant number, since it is smaller than the sum of its proper divisors (4895244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2721456 is a wasteful number, since it uses less digits than its factorization.

2721456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18913 (or 18904 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 2721456 is about 1649.6836060287. The cubic root of 2721456 is about 139.6155438449.

It can be divided in two parts, 272 and 1456, that added together give a cube (1728 = 12³).

The spelling of 2721456 in words is "two million, seven hundred twenty-one thousand, four hundred fifty-six".