1027649 has 4 divisors (see below), whose sum is σ = 1174464. Its totient is φ = 880836.

The previous prime is 1027643. The next prime is 1027679. The reversal of 1027649 is 9467201.

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: 9467201 = 347 ⋅27283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1027649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1027643) 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 in 3 ways as a sum of consecutive naturals, for example, 73397 + ... + 73410.

It is an arithmetic number, because the mean of its divisors is an integer number (293616).

2^1027649 is an apocalyptic number.

It is an amenable number.

1027649 is a deficient number, since it is larger than the sum of its proper divisors (146815).

1027649 is an equidigital number, since it uses as much as digits as its factorization.

1027649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146814.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1027649 is about 1013.7302402513. The cubic root of 1027649 is about 100.9132673699.

The spelling of 1027649 in words is "one million, twenty-seven thousand, six hundred forty-nine".