3722861 has 2 divisors, whose sum is σ = 3722862. Its totient is φ = 3722860.

The previous prime is 3722843. The next prime is 3722867. The reversal of 3722861 is 1682273.

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., 2856100 + 866761 = 1690^2 + 931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3722861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3722867) 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, 1861430 + 1861431.

It is an arithmetic number, because the mean of its divisors is an integer number (1861431).

Almost surely, 2^3722861 is an apocalyptic number.

It is an amenable number.

3722861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3722861 is an equidigital number, since it uses as much as digits as its factorization.

3722861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 3722861 is about 1929.4716893492. The cubic root of 3722861 is about 154.9859300444.

The spelling of 3722861 in words is "three million, seven hundred twenty-two thousand, eight hundred sixty-one".