1387876265 has 4 divisors (see below), whose sum is σ = 1665451524. Its totient is φ = 1110301008.

The previous prime is 1387876241. The next prime is 1387876267. The reversal of 1387876265 is 5626787831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 159163456 + 1228712809 = 12616^2 + 35053^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387876265 - 2¹⁰ = 1387875241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1387876267) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 138787622 + ... + 138787631.

It is an arithmetic number, because the mean of its divisors is an integer number (416362881).

Almost surely, 2^1387876265 is an apocalyptic number.

It is an amenable number.

1387876265 is a deficient number, since it is larger than the sum of its proper divisors (277575259).

1387876265 is an equidigital number, since it uses as much as digits as its factorization.

1387876265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277575258.

The product of its digits is 3386880, while the sum is 53.

The square root of 1387876265 is about 37254.2113726757. The cubic root of 1387876265 is about 1115.4503640263.

The spelling of 1387876265 in words is "one billion, three hundred eighty-seven million, eight hundred seventy-six thousand, two hundred sixty-five".