3121457 has 2 divisors, whose sum is σ = 3121458. Its totient is φ = 3121456.

The previous prime is 3121441. The next prime is 3121487. The reversal of 3121457 is 7541213.

3121457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2808976 + 312481 = 1676^2 + 559^2 .

It is an emirp because it is prime and its reverse (7541213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3121457 - 2⁴ = 3121441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3121427) 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, 1560728 + 1560729.

It is an arithmetic number, because the mean of its divisors is an integer number (1560729).

Almost surely, 2^3121457 is an apocalyptic number.

It is an amenable number.

3121457 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121457 is an equidigital number, since it uses as much as digits as its factorization.

3121457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 3121457 is about 1766.7645570364. The cubic root of 3121457 is about 146.1456137774.

The spelling of 3121457 in words is "three million, one hundred twenty-one thousand, four hundred fifty-seven".