3767221 has 2 divisors, whose sum is σ = 3767222. Its totient is φ = 3767220.

The previous prime is 3767219. The next prime is 3767227. The reversal of 3767221 is 1227673.

3767221 is nontrivially palindromic in base 12.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 1028196 = 1655^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 3767221 - 2¹ = 3767219 is a prime.

Together with 3767219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3767221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3767227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1883610 + 1883611.

It is an arithmetic number, because the mean of its divisors is an integer number (1883611).

Almost surely, 2^3767221 is an apocalyptic number.

It is an amenable number.

3767221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3767221 is an equidigital number, since it uses as much as digits as its factorization.

3767221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 3767221 is about 1940.9330230588. The cubic root of 3767221 is about 155.5990828494.

The spelling of 3767221 in words is "three million, seven hundred sixty-seven thousand, two hundred twenty-one".