3121427 has 2 divisors, whose sum is σ = 3121428. Its totient is φ = 3121426.

The previous prime is 3121423. The next prime is 3121429. The reversal of 3121427 is 7241213.

3121427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121427 - 2² = 3121423 is a prime.

Together with 3121429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121399 and 3121408.

It is not a weakly prime, because it can be changed into another prime (3121423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560713 + 1560714.

It is an arithmetic number, because the mean of its divisors is an integer number (1560714).

Almost surely, 2^3121427 is an apocalyptic number.

3121427 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121427 is an equidigital number, since it uses as much as digits as its factorization.

3121427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 3121427 is about 1766.7560669204. The cubic root of 3121427 is about 146.1451455791.

The spelling of 3121427 in words is "three million, one hundred twenty-one thousand, four hundred twenty-seven".