3721522 has 16 divisors (see below), whose sum is σ = 6412032. Its totient is φ = 1586880.

The previous prime is 3721489. The next prime is 3721537. The reversal of 3721522 is 2251273.

It is a junction number, because it is equal to n+sod(n) for n = 3721493 and 3721502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2823 + ... + 3925.

It is an arithmetic number, because the mean of its divisors is an integer number (400752).

Almost surely, 2^3721522 is an apocalyptic number.

3721522 is a deficient number, since it is larger than the sum of its proper divisors (2690510).

3721522 is a wasteful number, since it uses less digits than its factorization.

3721522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its digits is 840, while the sum is 22.

The square root of 3721522 is about 1929.1246719691. The cubic root of 3721522 is about 154.9673465727.

Adding to 3721522 its reverse (2251273), we get a palindrome (5972795).

The spelling of 3721522 in words is "three million, seven hundred twenty-one thousand, five hundred twenty-two".