2774721 has 4 divisors (see below), whose sum is σ = 3699632. Its totient is φ = 1849812.

The previous prime is 2774719. The next prime is 2774729. The reversal of 2774721 is 1274772.

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 not a de Polignac number, because 2774721 - 2¹ = 2774719 is a prime.

It is a D-number.

It is a Duffinian number.

2774721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2774729) 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, 462451 + ... + 462456.

It is an arithmetic number, because the mean of its divisors is an integer number (924908).

2^2774721 is an apocalyptic number.

It is an amenable number.

2774721 is a deficient number, since it is larger than the sum of its proper divisors (924911).

2774721 is an equidigital number, since it uses as much as digits as its factorization.

2774721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924910.

The product of its digits is 5488, while the sum is 30.

The square root of 2774721 is about 1665.7493809094. The cubic root of 2774721 is about 140.5205282332.

The spelling of 2774721 in words is "two million, seven hundred seventy-four thousand, seven hundred twenty-one".