1143497145 has 16 divisors (see below), whose sum is σ = 2090966400. Its totient is φ = 522741504.

The previous prime is 1143497087. The next prime is 1143497149. The reversal of 1143497145 is 5417943411.

It is not a de Polignac number, because 1143497145 - 2⁹ = 1143496633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143497149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5445120 + ... + 5445329.

It is an arithmetic number, because the mean of its divisors is an integer number (130685400).

Almost surely, 2^1143497145 is an apocalyptic number.

1143497145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143497145 is a deficient number, since it is larger than the sum of its proper divisors (947469255).

1143497145 is a wasteful number, since it uses less digits than its factorization.

1143497145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10890464.

The product of its digits is 60480, while the sum is 39.

The square root of 1143497145 is about 33815.6346236471. The cubic root of 1143497145 is about 1045.7110443547.

The spelling of 1143497145 in words is "one billion, one hundred forty-three million, four hundred ninety-seven thousand, one hundred forty-five".