1244200123 has 4 divisors (see below), whose sum is σ = 1309684360. Its totient is φ = 1178715888.

The previous prime is 1244200081. The next prime is 1244200127. The reversal of 1244200123 is 3210024421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210024421 = 25931 ⋅123791.

It is a cyclic number.

It is not a de Polignac number, because 1244200123 - 2¹⁷ = 1244069051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 65484217 = 1244200123 / (1 + 2 + 4 + 4 + 2 + 0 + 0 + 1 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1244200123.

It is not an unprimeable number, because it can be changed into a prime (1244200127) 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, 32742090 + ... + 32742127.

It is an arithmetic number, because the mean of its divisors is an integer number (327421090).

Almost surely, 2^1244200123 is an apocalyptic number.

1244200123 is a deficient number, since it is larger than the sum of its proper divisors (65484237).

1244200123 is an equidigital number, since it uses as much as digits as its factorization.

1244200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65484236.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1244200123 is about 35273.2210465673. The cubic root of 1244200123 is about 1075.5487007394.

Adding to 1244200123 its reverse (3210024421), we get a palindrome (4454224544).

The spelling of 1244200123 in words is "one billion, two hundred forty-four million, two hundred thousand, one hundred twenty-three".