1387221158 has 8 divisors (see below), whose sum is σ = 2091726720. Its totient is φ = 689978920.

The previous prime is 1387221133. The next prime is 1387221161. The reversal of 1387221158 is 8511227831.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1815353 + ... + 1816116.

It is an arithmetic number, because the mean of its divisors is an integer number (261465840).

Almost surely, 2^1387221158 is an apocalyptic number.

1387221158 is a deficient number, since it is larger than the sum of its proper divisors (704505562).

1387221158 is a wasteful number, since it uses less digits than its factorization.

1387221158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631662.

The product of its digits is 26880, while the sum is 38.

The square root of 1387221158 is about 37245.4179463729. The cubic root of 1387221158 is about 1115.2748310039.

Adding to 1387221158 its reverse (8511227831), we get a palindrome (9898448989).

The spelling of 1387221158 in words is "one billion, three hundred eighty-seven million, two hundred twenty-one thousand, one hundred fifty-eight".