1145421123 has 32 divisors (see below), whose sum is σ = 1912135680. Its totient is φ = 592505760.

The previous prime is 1145421119. The next prime is 1145421127. The reversal of 1145421123 is 3211245411.

It is an interprime number because it is at equal distance from previous prime (1145421119) and next prime (1145421127).

It is not a de Polignac number, because 1145421123 - 2² = 1145421119 is a prime.

It is a super-2 number, since 2×1145421123² = 2623979098029162258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145421093 and 1145421102.

It is not an unprimeable number, because it can be changed into a prime (1145421127) 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, 44836 + ... + 65582.

It is an arithmetic number, because the mean of its divisors is an integer number (59754240).

Almost surely, 2^1145421123 is an apocalyptic number.

1145421123 is a deficient number, since it is larger than the sum of its proper divisors (766714557).

1145421123 is a wasteful number, since it uses less digits than its factorization.

1145421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21007.

The product of its digits is 960, while the sum is 24.

The square root of 1145421123 is about 33844.0707214720. The cubic root of 1145421123 is about 1046.2971987746.

Adding to 1145421123 its reverse (3211245411), we get a palindrome (4356666534).

The spelling of 1145421123 in words is "one billion, one hundred forty-five million, four hundred twenty-one thousand, one hundred twenty-three".