3712021 has 2 divisors, whose sum is σ = 3712022. Its totient is φ = 3712020.

The previous prime is 3712019. The next prime is 3712043. The reversal of 3712021 is 1202173.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3132900 + 579121 = 1770^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 3712021 - 2¹ = 3712019 is a prime.

Together with 3712019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3711986 and 3712004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3712081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1856010 + 1856011.

It is an arithmetic number, because the mean of its divisors is an integer number (1856011).

Almost surely, 2^3712021 is an apocalyptic number.

It is an amenable number.

3712021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3712021 is an equidigital number, since it uses as much as digits as its factorization.

3712021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 3712021 is about 1926.6605824587. The cubic root of 3712021 is about 154.8353576088.

Adding to 3712021 its reverse (1202173), we get a palindrome (4914194).

The spelling of 3712021 in words is "three million, seven hundred twelve thousand, twenty-one".