3948521 has 2 divisors, whose sum is σ = 3948522. Its totient is φ = 3948520.

The previous prime is 3948493. The next prime is 3948533. The reversal of 3948521 is 1258493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 1860496 = 1445^2 + 1364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3948521 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3948541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974260 + 1974261.

It is an arithmetic number, because the mean of its divisors is an integer number (1974261).

Almost surely, 2^3948521 is an apocalyptic number.

It is an amenable number.

3948521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3948521 is an equidigital number, since it uses as much as digits as its factorization.

3948521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 3948521 is about 1987.0885737682. The cubic root of 3948521 is about 158.0561809504.

The spelling of 3948521 in words is "three million, nine hundred forty-eight thousand, five hundred twenty-one".