1022647 has 4 divisors (see below), whose sum is σ = 1040040. Its totient is φ = 1005256.

The previous prime is 1022639. The next prime is 1022653. The reversal of 1022647 is 7462201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7462201 = 17 ⋅438953.

It is a cyclic number.

It is not a de Polignac number, because 1022647 - 2³ = 1022639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022677) 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, 8608 + ... + 8725.

It is an arithmetic number, because the mean of its divisors is an integer number (260010).

2^1022647 is an apocalyptic number.

1022647 is a deficient number, since it is larger than the sum of its proper divisors (17393).

1022647 is an equidigital number, since it uses as much as digits as its factorization.

1022647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17392.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1022647 is about 1011.2601050175. The cubic root of 1022647 is about 100.7492718947.

Adding to 1022647 its reverse (7462201), we get a palindrome (8484848).

The spelling of 1022647 in words is "one million, twenty-two thousand, six hundred forty-seven".