1648513 has 2 divisors, whose sum is σ = 1648514. Its totient is φ = 1648512.

The previous prime is 1648499. The next prime is 1648523. The reversal of 1648513 is 3158461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1411344 + 237169 = 1188^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648513 - 2⁵ = 1648481 is a prime.

It is a super-2 number, since 2×1648513² = 5435190222338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1648523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824256 + 824257.

It is an arithmetic number, because the mean of its divisors is an integer number (824257).

2^1648513 is an apocalyptic number.

It is an amenable number.

1648513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648513 is an equidigital number, since it uses as much as digits as its factorization.

1648513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 1648513 is about 1283.9443134342. The cubic root of 1648513 is about 118.1310666612.

The spelling of 1648513 in words is "one million, six hundred forty-eight thousand, five hundred thirteen".