1648481 has 2 divisors, whose sum is σ = 1648482. Its totient is φ = 1648480.

The previous prime is 1648453. The next prime is 1648483. The reversal of 1648481 is 1848461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1032256 + 616225 = 1016^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648481 - 2⁶ = 1648417 is a prime.

It is a super-2 number, since 2×1648481² = 5434979214722, which contains 22 as substring.

Together with 1648483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1648483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824240 + 824241.

It is an arithmetic number, because the mean of its divisors is an integer number (824241).

2^1648481 is an apocalyptic number.

It is an amenable number.

1648481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648481 is an equidigital number, since it uses as much as digits as its factorization.

1648481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 32.

The square root of 1648481 is about 1283.9318517741. The cubic root of 1648481 is about 118.1303022918.

The spelling of 1648481 in words is "one million, six hundred forty-eight thousand, four hundred eighty-one".