1320001023 has 32 divisors (see below), whose sum is σ = 2040733440. Its totient is φ = 750056960.

The previous prime is 1320001013. The next prime is 1320001037. The reversal of 1320001023 is 3201000231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1320001023 - 2⁵ = 1320000991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320001013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146536 + ... + 155282.

It is an arithmetic number, because the mean of its divisors is an integer number (63772920).

Almost surely, 2^1320001023 is an apocalyptic number.

1320001023 is a deficient number, since it is larger than the sum of its proper divisors (720732417).

1320001023 is a wasteful number, since it uses less digits than its factorization.

1320001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9047.

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

The square root of 1320001023 is about 36331.8183277413. The cubic root of 1320001023 is about 1096.9615938681.

Adding to 1320001023 its reverse (3201000231), we get a palindrome (4521001254).

The spelling of 1320001023 in words is "one billion, three hundred twenty million, one thousand, twenty-three".