3521722 has 8 divisors (see below), whose sum is σ = 5321556. Its totient is φ = 1747872.

The previous prime is 3521699. The next prime is 3521723. The reversal of 3521722 is 2271253.

It can be written as a sum of positive squares in 2 ways, for example, as 3493161 + 28561 = 1869^2 + 169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3521693 and 3521702.

It is not an unprimeable number, because it can be changed into a prime (3521723) 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, 6153 + ... + 6700.

Almost surely, 2^3521722 is an apocalyptic number.

3521722 is a deficient number, since it is larger than the sum of its proper divisors (1799834).

3521722 is a wasteful number, since it uses less digits than its factorization.

3521722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12992.

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

The square root of 3521722 is about 1876.6251623593. The cubic root of 3521722 is about 152.1429000083.

Adding to 3521722 its reverse (2271253), we get a palindrome (5792975).

The spelling of 3521722 in words is "three million, five hundred twenty-one thousand, seven hundred twenty-two".