1321023 has 8 divisors (see below), whose sum is σ = 1921536. Its totient is φ = 800600.

The previous prime is 1321007. The next prime is 1321031. The reversal of 1321023 is 3201231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321023 - 2⁴ = 1321007 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19983 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (240192).

2^1321023 is an apocalyptic number.

1321023 is a deficient number, since it is larger than the sum of its proper divisors (600513).

1321023 is a wasteful number, since it uses less digits than its factorization.

1321023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40045.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1321023 is about 1149.3576466879. The cubic root of 1321023 is about 109.7244618983.

Adding to 1321023 its reverse (3201231), we get a palindrome (4522254).

The spelling of 1321023 in words is "one million, three hundred twenty-one thousand, twenty-three".