1387265715 has 48 divisors (see below), whose sum is σ = 2761274880. Its totient is φ = 637208640.

The previous prime is 1387265707. The next prime is 1387265729. The reversal of 1387265715 is 5175627831.

It is a happy number.

1387265715 is a `hidden beast` number, since 1 + 3 + 8 + 72 + 6 + 571 + 5 = 666.

It is not a de Polignac number, because 1387265715 - 2³ = 1387265707 is a prime.

It is a super-2 number, since 2×1387265715² = 3849012328028922450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64347 + ... + 83156.

It is an arithmetic number, because the mean of its divisors is an integer number (57526560).

Almost surely, 2^1387265715 is an apocalyptic number.

1387265715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1387265715 is a deficient number, since it is larger than the sum of its proper divisors (1374009165).

1387265715 is a wasteful number, since it uses less digits than its factorization.

1387265715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147544 (or 147541 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 1387265715 is about 37246.0160956846. The cubic root of 1387265715 is about 1115.2867716062.

It can be divided in two parts, 138726 and 5715, that added together give a palindrome (144441).

The spelling of 1387265715 in words is "one billion, three hundred eighty-seven million, two hundred sixty-five thousand, seven hundred fifteen".