3247421 has 2 divisors, whose sum is σ = 3247422. Its totient is φ = 3247420.

The previous prime is 3247417. The next prime is 3247427. The reversal of 3247421 is 1247423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2524921 + 722500 = 1589^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 3247421 - 2² = 3247417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3247427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1623710 + 1623711.

It is an arithmetic number, because the mean of its divisors is an integer number (1623711).

Almost surely, 2^3247421 is an apocalyptic number.

It is an amenable number.

3247421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3247421 is an equidigital number, since it uses as much as digits as its factorization.

3247421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 23.

The square root of 3247421 is about 1802.0602098709. The cubic root of 3247421 is about 148.0856121424.

The spelling of 3247421 in words is "three million, two hundred forty-seven thousand, four hundred twenty-one".