1243144023 has 16 divisors (see below), whose sum is σ = 1914575616. Its totient is φ = 709101440.

The previous prime is 1243143947. The next prime is 1243144087. The reversal of 1243144023 is 3204413421.

It is a cyclic number.

It is not a de Polignac number, because 1243144023 - 2¹² = 1243139927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243143984 and 1243144002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243144523) 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 15 ways as a sum of consecutive naturals, for example, 1107411 + ... + 1108532.

It is an arithmetic number, because the mean of its divisors is an integer number (119660976).

Almost surely, 2^1243144023 is an apocalyptic number.

1243144023 is a deficient number, since it is larger than the sum of its proper divisors (671431593).

1243144023 is a wasteful number, since it uses less digits than its factorization.

1243144023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215974.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1243144023 is about 35258.2475883303. The cubic root of 1243144023 is about 1075.2442994081.

Adding to 1243144023 its reverse (3204413421), we get a palindrome (4447557444).

The spelling of 1243144023 in words is "one billion, two hundred forty-three million, one hundred forty-four thousand, twenty-three".