1201040023 has 4 divisors (see below), whose sum is σ = 1207075600. Its totient is φ = 1195004448.

The previous prime is 1201040003. The next prime is 1201040039. The reversal of 1201040023 is 3200401021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3200401021 = 19 ⋅168442159.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201040023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201039985 and 1201040012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201040003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017490 + ... + 3017887.

It is an arithmetic number, because the mean of its divisors is an integer number (301768900).

Almost surely, 2^1201040023 is an apocalyptic number.

1201040023 is a deficient number, since it is larger than the sum of its proper divisors (6035577).

1201040023 is an equidigital number, since it uses as much as digits as its factorization.

1201040023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035576.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1201040023 is about 34656.0243392112. The cubic root of 1201040023 is about 1062.9654775778.

Adding to 1201040023 its reverse (3200401021), we get a palindrome (4401441044).

The spelling of 1201040023 in words is "one billion, two hundred one million, forty thousand, twenty-three".