3671021 has 2 divisors, whose sum is σ = 3671022. Its totient is φ = 3671020.

The previous prime is 3670999. The next prime is 3671027. The reversal of 3671021 is 1201763.

It is a happy number.

3671021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2515396 + 1155625 = 1586^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 3671021 - 2⁶ = 3670957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3670984 and 3671002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3671027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1835510 + 1835511.

It is an arithmetic number, because the mean of its divisors is an integer number (1835511).

Almost surely, 2^3671021 is an apocalyptic number.

It is an amenable number.

3671021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3671021 is an equidigital number, since it uses as much as digits as its factorization.

3671021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 3671021 is about 1915.9908663665. The cubic root of 3671021 is about 154.2631835200.

Adding to 3671021 its reverse (1201763), we get a palindrome (4872784).

The spelling of 3671021 in words is "three million, six hundred seventy-one thousand, twenty-one".