2722005 has 80 divisors (see below), whose sum is σ = 5854464. Its totient is φ = 1192320.

The previous prime is 2722001. The next prime is 2722007. The reversal of 2722005 is 5002272.

It is a happy number.

It is not a de Polignac number, because 2722005 - 2² = 2722001 is a prime.

It is a super-2 number, since 2×2722005² = 14818622440050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2722001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 57892 + ... + 57938.

2^2722005 is an apocalyptic number.

It is an amenable number.

2722005 is an abundant number, since it is smaller than the sum of its proper divisors (3132459).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2722005 is a wasteful number, since it uses less digits than its factorization.

2722005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 2722005 is about 1649.8499931812. The cubic root of 2722005 is about 139.6249314399.

Adding to 2722005 its reverse (5002272), we get a palindrome (7724277).

The spelling of 2722005 in words is "two million, seven hundred twenty-two thousand, five".