2721901 has 12 divisors (see below), whose sum is σ = 3410652. Its totient is φ = 2153088.

The previous prime is 2721899. The next prime is 2721913. The reversal of 2721901 is 1091272.

It can be written as a sum of positive squares in 2 ways, for example, as 561001 + 2160900 = 749^2 + 1470^2 .

It is not a de Polignac number, because 2721901 - 2¹ = 2721899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1500 + ... + 2773.

It is an arithmetic number, because the mean of its divisors is an integer number (284221).

2^2721901 is an apocalyptic number.

It is an amenable number.

2721901 is a deficient number, since it is larger than the sum of its proper divisors (688751).

2721901 is a wasteful number, since it uses less digits than its factorization.

2721901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300 (or 4293 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2721901 is about 1649.8184748632. The cubic root of 2721901 is about 139.6231531946.

The spelling of 2721901 in words is "two million, seven hundred twenty-one thousand, nine hundred one".