1381418765 has 8 divisors (see below), whose sum is σ = 1688980248. Its totient is φ = 1084283200.

The previous prime is 1381418737. The next prime is 1381418821. The reversal of 1381418765 is 5678141831.

It can be written as a sum of positive squares in 4 ways, for example, as 197852356 + 1183566409 = 14066^2 + 34403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1381418765 - 2¹² = 1381414669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606186 + ... + 2606715.

It is an arithmetic number, because the mean of its divisors is an integer number (211122531).

Almost surely, 2^1381418765 is an apocalyptic number.

It is an amenable number.

1381418765 is a deficient number, since it is larger than the sum of its proper divisors (307561483).

1381418765 is an equidigital number, since it uses as much as digits as its factorization.

1381418765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212959.

The product of its digits is 161280, while the sum is 44.

The square root of 1381418765 is about 37167.4422714289. The cubic root of 1381418765 is about 1113.7176876918.

The spelling of 1381418765 in words is "one billion, three hundred eighty-one million, four hundred eighteen thousand, seven hundred sixty-five".