1145144423 has 4 divisors (see below), whose sum is σ = 1145918088. Its totient is φ = 1144370760.

The previous prime is 1145144359. The next prime is 1145144449. The reversal of 1145144423 is 3244415411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1145144423 - 2⁶ = 1145144359 is a prime.

It is a super-2 number, since 2×1145144423² = 2622711499056005858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145141423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384608 + ... + 387573.

It is an arithmetic number, because the mean of its divisors is an integer number (286479522).

Almost surely, 2^1145144423 is an apocalyptic number.

1145144423 is a deficient number, since it is larger than the sum of its proper divisors (773665).

1145144423 is an equidigital number, since it uses as much as digits as its factorization.

1145144423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773664.

The product of its digits is 7680, while the sum is 29.

The square root of 1145144423 is about 33839.9826093336. The cubic root of 1145144423 is about 1046.2129404627.

Adding to 1145144423 its reverse (3244415411), we get a palindrome (4389559834).

The spelling of 1145144423 in words is "one billion, one hundred forty-five million, one hundred forty-four thousand, four hundred twenty-three".