2720971 has 16 divisors (see below), whose sum is σ = 3202560. Its totient is φ = 2285280.

The previous prime is 2720953. The next prime is 2720981. The reversal of 2720971 is 1790272.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2720971 - 2⁷ = 2720843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2720981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9685 + ... + 9961.

It is an arithmetic number, because the mean of its divisors is an integer number (200160).

2^2720971 is an apocalyptic number.

2720971 is a deficient number, since it is larger than the sum of its proper divisors (481589).

2720971 is a wasteful number, since it uses less digits than its factorization.

2720971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 2720971 is about 1649.5366015945. The cubic root of 2720971 is about 139.6072495640.

The spelling of 2720971 in words is "two million, seven hundred twenty thousand, nine hundred seventy-one".