3121423 has 2 divisors, whose sum is σ = 3121424. Its totient is φ = 3121422.

The previous prime is 3121409. The next prime is 3121427. The reversal of 3121423 is 3241213.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3241213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121397 and 3121406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560711 + 1560712.

It is an arithmetic number, because the mean of its divisors is an integer number (1560712).

Almost surely, 2^3121423 is an apocalyptic number.

3121423 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121423 is an equidigital number, since it uses as much as digits as its factorization.

3121423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 3121423 is about 1766.7549349018. The cubic root of 3121423 is about 146.1450831524.

Adding to 3121423 its reverse (3241213), we get a palindrome (6362636).

The spelling of 3121423 in words is "three million, one hundred twenty-one thousand, four hundred twenty-three".