3521237 has 2 divisors, whose sum is σ = 3521238. Its totient is φ = 3521236.

The previous prime is 3521201. The next prime is 3521239. The reversal of 3521237 is 7321253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3129361 + 391876 = 1769^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 3521237 - 2⁶ = 3521173 is a prime.

It is a super-2 number, since 2×3521237² = 24798220020338, which contains 22 as substring.

Together with 3521239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3521239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760618 + 1760619.

It is an arithmetic number, because the mean of its divisors is an integer number (1760619).

Almost surely, 2^3521237 is an apocalyptic number.

It is an amenable number.

3521237 is a deficient number, since it is larger than the sum of its proper divisors (1).

3521237 is an equidigital number, since it uses as much as digits as its factorization.

3521237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 23.

The square root of 3521237 is about 1876.4959365797. The cubic root of 3521237 is about 152.1359154806.

The spelling of 3521237 in words is "three million, five hundred twenty-one thousand, two hundred thirty-seven".