3948121 has 2 divisors, whose sum is σ = 3948122. Its totient is φ = 3948120.

The previous prime is 3948101. The next prime is 3948137. The reversal of 3948121 is 1218493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2822400 + 1125721 = 1680^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 3948121 - 2²¹ = 1850969 is a prime.

It is a Chen prime.

3948121 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3948121.

It is not a weakly prime, because it can be changed into another prime (3948101) 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, 1974060 + 1974061.

It is an arithmetic number, because the mean of its divisors is an integer number (1974061).

Almost surely, 2^3948121 is an apocalyptic number.

It is an amenable number.

3948121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3948121 is an equidigital number, since it uses as much as digits as its factorization.

3948121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 3948121 is about 1986.9879214530. The cubic root of 3948121 is about 158.0508435420.

It can be divided in two parts, 394 and 8121, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 3948121 in words is "three million, nine hundred forty-eight thousand, one hundred twenty-one".