3117421 has 2 divisors, whose sum is σ = 3117422. Its totient is φ = 3117420.

The previous prime is 3117299. The next prime is 3117431. The reversal of 3117421 is 1247113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1929321 + 1188100 = 1389^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 3117421 - 2⁷ = 3117293 is a prime.

3117421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3117431) 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, 1558710 + 1558711.

It is an arithmetic number, because the mean of its divisors is an integer number (1558711).

Almost surely, 2^3117421 is an apocalyptic number.

It is an amenable number.

3117421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3117421 is an equidigital number, since it uses as much as digits as its factorization.

3117421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 19.

The square root of 3117421 is about 1765.6219867231. The cubic root of 3117421 is about 146.0825985359.

The spelling of 3117421 in words is "three million, one hundred seventeen thousand, four hundred twenty-one".