1011649 has 2 divisors, whose sum is σ = 1011650. Its totient is φ = 1011648.

The previous prime is 1011641. The next prime is 1011667. The reversal of 1011649 is 9461101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 986049 + 25600 = 993^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011649 - 2³ = 1011641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1011641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505824 + 505825.

It is an arithmetic number, because the mean of its divisors is an integer number (505825).

2^1011649 is an apocalyptic number.

It is an amenable number.

1011649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011649 is an equidigital number, since it uses as much as digits as its factorization.

1011649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1011649 is about 1005.8076356839. The cubic root of 1011649 is about 100.3868019137.

The spelling of 1011649 in words is "one million, eleven thousand, six hundred forty-nine".