1375570138 has 4 divisors (see below), whose sum is σ = 2063355210. Its totient is φ = 687785068.

The previous prime is 1375570123. The next prime is 1375570159. The reversal of 1375570138 is 8310755731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8310755731 = 977 ⋅8506403.

It can be written as a sum of positive squares in only one way, i.e., 871253289 + 504316849 = 29517^2 + 22457^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1375570138.

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 as a sum of consecutive naturals, namely, 343892533 + ... + 343892536.

Almost surely, 2^1375570138 is an apocalyptic number.

1375570138 is a deficient number, since it is larger than the sum of its proper divisors (687785072).

1375570138 is an equidigital number, since it uses as much as digits as its factorization.

1375570138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687785071.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 1375570138 is about 37088.6793779450. The cubic root of 1375570138 is about 1112.1437180541.

The spelling of 1375570138 in words is "one billion, three hundred seventy-five million, five hundred seventy thousand, one hundred thirty-eight".