2721019 has 8 divisors (see below), whose sum is σ = 3173600. Its totient is φ = 2332008.

The previous prime is 2721013. The next prime is 2721023. The reversal of 2721019 is 9101272.

It is not a de Polignac number, because 2721019 - 2⁵ = 2720987 is a prime.

It is a super-2 number, since 2×2721019² = 14807888796722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2721013) 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, 3624 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (396700).

2^2721019 is an apocalyptic number.

2721019 is a deficient number, since it is larger than the sum of its proper divisors (452581).

2721019 is an frugal number, since it uses more digits than its factorization.

2721019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7954 (or 7940 counting only the distinct ones).

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

The square root of 2721019 is about 1649.5511510711. The cubic root of 2721019 is about 139.6080704852.

The spelling of 2721019 in words is "two million, seven hundred twenty-one thousand, nineteen".