3956401 has 2 divisors, whose sum is σ = 3956402. Its totient is φ = 3956400.

The previous prime is 3956353. The next prime is 3956419. The reversal of 3956401 is 1046593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2958400 + 998001 = 1720^2 + 999^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956401 - 2¹⁷ = 3825329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3956401.

It is not a weakly prime, because it can be changed into another prime (3956471) 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, 1978200 + 1978201.

It is an arithmetic number, because the mean of its divisors is an integer number (1978201).

Almost surely, 2^3956401 is an apocalyptic number.

It is an amenable number.

3956401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956401 is an equidigital number, since it uses as much as digits as its factorization.

3956401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 3956401 is about 1989.0703858838. The cubic root of 3956401 is about 158.1612544782.

It can be divided in two parts, 395640 and 1, that added together give a square (395641 = 629²).

The spelling of 3956401 in words is "three million, nine hundred fifty-six thousand, four hundred one".