1648531 has 2 divisors, whose sum is σ = 1648532. Its totient is φ = 1648530.

The previous prime is 1648529. The next prime is 1648553. The reversal of 1648531 is 1358461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1648531 - 2¹ = 1648529 is a prime.

It is a super-2 number, since 2×1648531² = 5435308915922, which contains 22 as substring.

Together with 1648529, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

1648531 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1648531.

It is not a weakly prime, because it can be changed into another prime (1640531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824265 + 824266.

It is an arithmetic number, because the mean of its divisors is an integer number (824266).

2^1648531 is an apocalyptic number.

1648531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648531 is an equidigital number, since it uses as much as digits as its factorization.

1648531 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 1648531 is about 1283.9513230649. The cubic root of 1648531 is about 118.1314966146.

The spelling of 1648531 in words is "one million, six hundred forty-eight thousand, five hundred thirty-one".