3720401 has 2 divisors, whose sum is σ = 3720402. Its totient is φ = 3720400.

The previous prime is 3720397. The next prime is 3720407. The reversal of 3720401 is 1040273.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2972176 + 748225 = 1724^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720401 - 2² = 3720397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3720401.

It is not a weakly prime, because it can be changed into another prime (3720407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860200 + 1860201.

It is an arithmetic number, because the mean of its divisors is an integer number (1860201).

Almost surely, 2^3720401 is an apocalyptic number.

It is an amenable number.

3720401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720401 is an equidigital number, since it uses as much as digits as its factorization.

3720401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 3720401 is about 1928.8341038047. The cubic root of 3720401 is about 154.9517852118.

Adding to 3720401 its reverse (1040273), we get a palindrome (4760674).

The spelling of 3720401 in words is "three million, seven hundred twenty thousand, four hundred one".