1145023131 has 48 divisors (see below), whose sum is σ = 1819303200. Its totient is φ = 638507520.

The previous prime is 1145023123. The next prime is 1145023171. The reversal of 1145023131 is 1313205411.

It is not a de Polignac number, because 1145023131 - 2³ = 1145023123 is a prime.

It is a super-2 number, since 2×1145023131² = 2622155941050086322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1145023098 and 1145023107.

It is not an unprimeable number, because it can be changed into a prime (1145023111) 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 47 ways as a sum of consecutive naturals, for example, 1335655 + ... + 1336511.

It is an arithmetic number, because the mean of its divisors is an integer number (37902150).

Almost surely, 2^1145023131 is an apocalyptic number.

1145023131 is a deficient number, since it is larger than the sum of its proper divisors (674280069).

1145023131 is a wasteful number, since it uses less digits than its factorization.

1145023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1145023131 is about 33838.1904214750. The cubic root of 1145023131 is about 1046.1760013839.

Adding to 1145023131 its reverse (1313205411), we get a palindrome (2458228542).

The spelling of 1145023131 in words is "one billion, one hundred forty-five million, twenty-three thousand, one hundred thirty-one".