3678121 has 2 divisors, whose sum is σ = 3678122. Its totient is φ = 3678120.

The previous prime is 3678113. The next prime is 3678131. The reversal of 3678121 is 1218763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3610000 + 68121 = 1900^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 3678121 - 2³ = 3678113 is a prime.

It is a Chen prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 3678121.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3678131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1839060 + 1839061.

It is an arithmetic number, because the mean of its divisors is an integer number (1839061).

Almost surely, 2^3678121 is an apocalyptic number.

It is an amenable number.

3678121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3678121 is an equidigital number, since it uses as much as digits as its factorization.

3678121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 3678121 is about 1917.8427985630. The cubic root of 3678121 is about 154.3625712428.

The spelling of 3678121 in words is "three million, six hundred seventy-eight thousand, one hundred twenty-one".