2738721 has 8 divisors (see below), whose sum is σ = 3713760. Its totient is φ = 1794752.

The previous prime is 2738719. The next prime is 2738753. The reversal of 2738721 is 1278372.

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

It is a cyclic number.

It is not a de Polignac number, because 2738721 - 2¹ = 2738719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2738761) 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, 7560 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (464220).

2^2738721 is an apocalyptic number.

It is an amenable number.

2738721 is a deficient number, since it is larger than the sum of its proper divisors (975039).

2738721 is a wasteful number, since it uses less digits than its factorization.

2738721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15535.

The product of its digits is 4704, while the sum is 30.

The square root of 2738721 is about 1654.9081545512. The cubic root of 2738721 is about 139.9101634536.

The spelling of 2738721 in words is "two million, seven hundred thirty-eight thousand, seven hundred twenty-one".