3628421 has 2 divisors, whose sum is σ = 3628422. Its totient is φ = 3628420.

The previous prime is 3628403. The next prime is 3628439. The reversal of 3628421 is 1248263.

It is a balanced prime because it is at equal distance from previous prime (3628403) and next prime (3628439).

It can be written as a sum of positive squares in only one way, i.e., 2515396 + 1113025 = 1586^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3628421 - 2⁶ = 3628357 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3628481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1814210 + 1814211.

It is an arithmetic number, because the mean of its divisors is an integer number (1814211).

Almost surely, 2^3628421 is an apocalyptic number.

It is an amenable number.

3628421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3628421 is an equidigital number, since it uses as much as digits as its factorization.

3628421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 3628421 is about 1904.8414632194. The cubic root of 3628421 is about 153.6641497500.

The spelling of 3628421 in words is "three million, six hundred twenty-eight thousand, four hundred twenty-one".