2720761 has 4 divisors (see below), whose sum is σ = 2724352. Its totient is φ = 2717172.

The previous prime is 2720747. The next prime is 2720789. The reversal of 2720761 is 1670272.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2720761 - 2¹¹ = 2718713 is a prime.

It is a Duffinian number.

2720761 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2723761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (681088).

2^2720761 is an apocalyptic number.

It is an amenable number.

2720761 is a deficient number, since it is larger than the sum of its proper divisors (3591).

2720761 is a wasteful number, since it uses less digits than its factorization.

2720761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 2720761 is about 1649.4729461255. The cubic root of 2720761 is about 139.6036579201.

It can be divided in two parts, 2720 and 761, that added together give a square (3481 = 59²).

The spelling of 2720761 in words is "two million, seven hundred twenty thousand, seven hundred sixty-one".