2738521 has 4 divisors (see below), whose sum is σ = 2754000. Its totient is φ = 2723044.

The previous prime is 2738507. The next prime is 2738539. The reversal of 2738521 is 1258372.

2738521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2738521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2738521.

It is not an unprimeable number, because it can be changed into a prime (2738321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7471 + ... + 7828.

It is an arithmetic number, because the mean of its divisors is an integer number (688500).

2^2738521 is an apocalyptic number.

It is an amenable number.

2738521 is a deficient number, since it is larger than the sum of its proper divisors (15479).

2738521 is a wasteful number, since it uses less digits than its factorization.

2738521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15478.

The product of its digits is 3360, while the sum is 28.

The square root of 2738521 is about 1654.8477271338. The cubic root of 2738521 is about 139.9067576407.

The spelling of 2738521 in words is "two million, seven hundred thirty-eight thousand, five hundred twenty-one".