1022871 has 4 divisors (see below), whose sum is σ = 1363832. Its totient is φ = 681912.

The previous prime is 1022869. The next prime is 1022881. The reversal of 1022871 is 1782201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1022871 - 2¹ = 1022869 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022821) 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, 170476 + ... + 170481.

It is an arithmetic number, because the mean of its divisors is an integer number (340958).

2^1022871 is an apocalyptic number.

1022871 is a deficient number, since it is larger than the sum of its proper divisors (340961).

1022871 is an equidigital number, since it uses as much as digits as its factorization.

1022871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340960.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1022871 is about 1011.3708518639. The cubic root of 1022871 is about 100.7566273782.

The spelling of 1022871 in words is "one million, twenty-two thousand, eight hundred seventy-one".