1144426987 has 4 divisors (see below), whose sum is σ = 1248465816. Its totient is φ = 1040388160.

The previous prime is 1144426979. The next prime is 1144426999. The reversal of 1144426987 is 7896244411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7896244411 = 11 ⋅717840401.

It is a cyclic number.

It is not a de Polignac number, because 1144426987 - 2³ = 1144426979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144426937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52019398 + ... + 52019419.

It is an arithmetic number, because the mean of its divisors is an integer number (312116454).

Almost surely, 2^1144426987 is an apocalyptic number.

1144426987 is a deficient number, since it is larger than the sum of its proper divisors (104038829).

1144426987 is a wasteful number, since it uses less digits than its factorization.

1144426987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104038828.

The product of its digits is 387072, while the sum is 46.

The square root of 1144426987 is about 33829.3805293564. The cubic root of 1144426987 is about 1045.9944097646.

The spelling of 1144426987 in words is "one billion, one hundred forty-four million, four hundred twenty-six thousand, nine hundred eighty-seven".