2721522 has 16 divisors (see below), whose sum is σ = 5729760. Its totient is φ = 859392.

The previous prime is 2721517. The next prime is 2721533. The reversal of 2721522 is 2251272.

It is a happy number.

2721522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11823 + ... + 12050.

It is an arithmetic number, because the mean of its divisors is an integer number (358110).

2^2721522 is an apocalyptic number.

2721522 is an abundant number, since it is smaller than the sum of its proper divisors (3008238).

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

2721522 is a wasteful number, since it uses less digits than its factorization.

2721522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23897.

The product of its digits is 560, while the sum is 21.

The square root of 2721522 is about 1649.7036097433. The cubic root of 2721522 is about 139.6166724750.

Adding to 2721522 its reverse (2251272), we get a palindrome (4972794).

The spelling of 2721522 in words is "two million, seven hundred twenty-one thousand, five hundred twenty-two".