1138752481 has 8 divisors (see below), whose sum is σ = 1177750784. Its totient is φ = 1099895760.

The previous prime is 1138752473. The next prime is 1138752487. The reversal of 1138752481 is 1842578311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1138752481 - 2³ = 1138752473 is a prime.

It is a super-2 number, since 2×1138752481² = 2593514425967310722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138752487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18906 + ... + 51331.

It is an arithmetic number, because the mean of its divisors is an integer number (147218848).

Almost surely, 2^1138752481 is an apocalyptic number.

It is an amenable number.

1138752481 is a deficient number, since it is larger than the sum of its proper divisors (38998303).

1138752481 is an equidigital number, since it uses as much as digits as its factorization.

1138752481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70791.

The product of its digits is 53760, while the sum is 40.

The square root of 1138752481 is about 33745.4068133724. The cubic root of 1138752481 is about 1044.2627312634.

The spelling of 1138752481 in words is "one billion, one hundred thirty-eight million, seven hundred fifty-two thousand, four hundred eighty-one".