3031421 has 2 divisors, whose sum is σ = 3031422. Its totient is φ = 3031420.

The previous prime is 3031403. The next prime is 3031463. The reversal of 3031421 is 1241303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2059225 + 972196 = 1435^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 3031421 - 2¹⁴ = 3015037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3031396 and 3031405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3031481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515710 + 1515711.

It is an arithmetic number, because the mean of its divisors is an integer number (1515711).

Almost surely, 2^3031421 is an apocalyptic number.

It is an amenable number.

3031421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3031421 is an equidigital number, since it uses as much as digits as its factorization.

3031421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3031421 is about 1741.0976422935. The cubic root of 3031421 is about 144.7267306586.

Adding to 3031421 its reverse (1241303), we get a palindrome (4272724).

The spelling of 3031421 in words is "three million, thirty-one thousand, four hundred twenty-one".