1381106128 has 10 divisors (see below), whose sum is σ = 2675893154. Its totient is φ = 690553056.

The previous prime is 1381106117. The next prime is 1381106131. The reversal of 1381106128 is 8216011831.

It can be written as a sum of positive squares in only one way, i.e., 1295136144 + 85969984 = 35988^2 + 9272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1381106128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43159551 + ... + 43159582.

Almost surely, 2^1381106128 is an apocalyptic number.

It is an amenable number.

1381106128 is a deficient number, since it is larger than the sum of its proper divisors (1294787026).

1381106128 is an equidigital number, since it uses as much as digits as its factorization.

1381106128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86319141 (or 86319135 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1381106128 is about 37163.2362422865. The cubic root of 1381106128 is about 1113.6336640209.

Adding to 1381106128 its reverse (8216011831), we get a palindrome (9597117959).

The spelling of 1381106128 in words is "one billion, three hundred eighty-one million, one hundred six thousand, one hundred twenty-eight".