1006649 has 4 divisors (see below), whose sum is σ = 1150464. Its totient is φ = 862836.

The previous prime is 1006637. The next prime is 1006651. The reversal of 1006649 is 9466001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9466001 = 157 ⋅60293.

It is a cyclic number.

It is not a de Polignac number, because 1006649 - 2⁴ = 1006633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1006609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71897 + ... + 71910.

It is an arithmetic number, because the mean of its divisors is an integer number (287616).

2^1006649 is an apocalyptic number.

It is an amenable number.

1006649 is a deficient number, since it is larger than the sum of its proper divisors (143815).

1006649 is an equidigital number, since it uses as much as digits as its factorization.

1006649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143814.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1006649 is about 1003.3189921456. The cubic root of 1006649 is about 100.2211439265.

The spelling of 1006649 in words is "one million, six thousand, six hundred forty-nine".