3766421 has 2 divisors, whose sum is σ = 3766422. Its totient is φ = 3766420.

The previous prime is 3766417. The next prime is 3766453. The reversal of 3766421 is 1246673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3062500 + 703921 = 1750^2 + 839^2 .

It is an emirp because it is prime and its reverse (1246673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3766421 - 2² = 3766417 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 (3766471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1883210 + 1883211.

It is an arithmetic number, because the mean of its divisors is an integer number (1883211).

Almost surely, 2^3766421 is an apocalyptic number.

It is an amenable number.

3766421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3766421 is an equidigital number, since it uses as much as digits as its factorization.

3766421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 3766421 is about 1940.7269256647. The cubic root of 3766421 is about 155.5880678263.

The spelling of 3766421 in words is "three million, seven hundred sixty-six thousand, four hundred twenty-one".