3521997 has 12 divisors (see below), whose sum is σ = 5145660. Its totient is φ = 2321088.

The previous prime is 3521977. The next prime is 3522007. The reversal of 3521997 is 7991253.

It can be written as a sum of positive squares in 2 ways, for example, as 1153476 + 2368521 = 1074^2 + 1539^2 .

It is not a de Polignac number, because 3521997 - 2⁶ = 3521933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1398 + ... + 2999.

It is an arithmetic number, because the mean of its divisors is an integer number (428805).

Almost surely, 2^3521997 is an apocalyptic number.

It is an amenable number.

3521997 is a deficient number, since it is larger than the sum of its proper divisors (1623663).

3521997 is a wasteful number, since it uses less digits than its factorization.

3521997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492 (or 4489 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 3521997 is about 1876.6984307555. The cubic root of 3521997 is about 152.1468600226.

The spelling of 3521997 in words is "three million, five hundred twenty-one thousand, nine hundred ninety-seven".