3106421 has 2 divisors, whose sum is σ = 3106422. Its totient is φ = 3106420.

The previous prime is 3106387. The next prime is 3106423. The reversal of 3106421 is 1246013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2402500 + 703921 = 1550^2 + 839^2 .

It is an emirp because it is prime and its reverse (1246013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3106421 - 2¹⁸ = 2844277 is a prime.

Together with 3106423, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3106421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3106423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1553210 + 1553211.

It is an arithmetic number, because the mean of its divisors is an integer number (1553211).

Almost surely, 2^3106421 is an apocalyptic number.

It is an amenable number.

3106421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3106421 is an equidigital number, since it uses as much as digits as its factorization.

3106421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3106421 is about 1762.5041843922. The cubic root of 3106421 is about 145.9105757516.

The spelling of 3106421 in words is "three million, one hundred six thousand, four hundred twenty-one".