3620401 has 2 divisors, whose sum is σ = 3620402. Its totient is φ = 3620400.

The previous prime is 3620387. The next prime is 3620437. The reversal of 3620401 is 1040263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 160801 = 1860^2 + 401^2 .

It is a cyclic number.

It is not a de Polignac number, because 3620401 - 2⁵ = 3620369 is a prime.

3620401 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3620501) 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, 1810200 + 1810201.

It is an arithmetic number, because the mean of its divisors is an integer number (1810201).

Almost surely, 2^3620401 is an apocalyptic number.

It is an amenable number.

3620401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3620401 is an equidigital number, since it uses as much as digits as its factorization.

3620401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3620401 is about 1902.7351365863. The cubic root of 3620401 is about 153.5508501825.

Adding to 3620401 its reverse (1040263), we get a palindrome (4660664).

The spelling of 3620401 in words is "three million, six hundred twenty thousand, four hundred one".