1388131125 has 32 divisors (see below), whose sum is σ = 2344368000. Its totient is φ = 729273600.

The previous prime is 1388131099. The next prime is 1388131133. The reversal of 1388131125 is 5211318831.

It is not a de Polignac number, because 1388131125 - 2¹⁵ = 1388098357 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2500 + ... + 52749.

It is an arithmetic number, because the mean of its divisors is an integer number (73261500).

Almost surely, 2^1388131125 is an apocalyptic number.

1388131125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388131125 is a deficient number, since it is larger than the sum of its proper divisors (956236875).

1388131125 is an equidigital number, since it uses as much as digits as its factorization.

1388131125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55334 (or 55324 counting only the distinct ones).

The product of its digits is 5760, while the sum is 33.

The square root of 1388131125 is about 37257.6317685384. The cubic root of 1388131125 is about 1115.5186377112.

Adding to 1388131125 its reverse (5211318831), we get a palindrome (6599449956).

The spelling of 1388131125 in words is "one billion, three hundred eighty-eight million, one hundred thirty-one thousand, one hundred twenty-five".