1144375491 has 16 divisors (see below), whose sum is σ = 1835590400. Its totient is φ = 619511328.

The previous prime is 1144375483. The next prime is 1144375601. The reversal of 1144375491 is 1945734411.

It is not a de Polignac number, because 1144375491 - 2³ = 1144375483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144375471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1433656 + ... + 1434453.

It is an arithmetic number, because the mean of its divisors is an integer number (114724400).

Almost surely, 2^1144375491 is an apocalyptic number.

1144375491 is a deficient number, since it is larger than the sum of its proper divisors (691214909).

1144375491 is a wasteful number, since it uses less digits than its factorization.

1144375491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868138.

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

The square root of 1144375491 is about 33828.6194072416. The cubic root of 1144375491 is about 1045.9787205924.

The spelling of 1144375491 in words is "one billion, one hundred forty-four million, three hundred seventy-five thousand, four hundred ninety-one".