1023091 has 4 divisors (see below), whose sum is σ = 1058400. Its totient is φ = 987784.

The previous prime is 1023083. The next prime is 1023101. The reversal of 1023091 is 1903201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1903201 = 17 ⋅111953.

It is a cyclic number.

It is not a de Polignac number, because 1023091 - 2³ = 1023083 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1023041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17611 + ... + 17668.

It is an arithmetic number, because the mean of its divisors is an integer number (264600).

2^1023091 is an apocalyptic number.

1023091 is a deficient number, since it is larger than the sum of its proper divisors (35309).

1023091 is an equidigital number, since it uses as much as digits as its factorization.

1023091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35308.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1023091 is about 1011.4796092853. The cubic root of 1023091 is about 100.7638504686.

Adding to 1023091 its reverse (1903201), we get a palindrome (2926292).

It can be divided in two parts, 10230 and 91, that multiplied together give a triangular number (930930 = T₁₃₆₄).

The spelling of 1023091 in words is "one million, twenty-three thousand, ninety-one".