1028161 has 4 divisors (see below), whose sum is σ = 1031472. Its totient is φ = 1024852.

The previous prime is 1028149. The next prime is 1028189. The reversal of 1028161 is 1618201.

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: 1618201 = 13 ⋅124477.

It is a cyclic number.

It is not a de Polignac number, because 1028161 - 2⁵ = 1028129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028101) 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, 1135 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (257868).

2^1028161 is an apocalyptic number.

It is an amenable number.

1028161 is a deficient number, since it is larger than the sum of its proper divisors (3311).

1028161 is an equidigital number, since it uses as much as digits as its factorization.

1028161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1028161 is about 1013.9827414705. The cubic root of 1028161 is about 100.9300237444.

The spelling of 1028161 in words is "one million, twenty-eight thousand, one hundred sixty-one".