1365187138 has 12 divisors (see below), whose sum is σ = 2382112422. Its totient is φ = 585080160.

The previous prime is 1365187129. The next prime is 1365187141. The reversal of 1365187138 is 8317815631.

It can be written as a sum of positive squares in only one way, i.e., 1110688929 + 254498209 = 33327^2 + 15953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1365187094 and 1365187103.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6965143 + ... + 6965338.

Almost surely, 2^1365187138 is an apocalyptic number.

1365187138 is a deficient number, since it is larger than the sum of its proper divisors (1016925284).

1365187138 is a wasteful number, since it uses less digits than its factorization.

1365187138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930497 (or 13930490 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 1365187138 is about 36948.4389115427. The cubic root of 1365187138 is about 1109.3384413826.

The spelling of 1365187138 in words is "one billion, three hundred sixty-five million, one hundred eighty-seven thousand, one hundred thirty-eight".