1385265855 has 16 divisors (see below), whose sum is σ = 2267971200. Its totient is φ = 721626528.

The previous prime is 1385265853. The next prime is 1385265857. The reversal of 1385265855 is 5585625831.

It is an interprime number because it is at equal distance from previous prime (1385265853) and next prime (1385265857).

It is not a de Polignac number, because 1385265855 - 2¹ = 1385265853 is a prime.

It is a super-2 number, since 2×1385265855² = 3837922978057762050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385265853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1073205 + ... + 1074494.

It is an arithmetic number, because the mean of its divisors is an integer number (141748200).

Almost surely, 2^1385265855 is an apocalyptic number.

1385265855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1385265855 is a deficient number, since it is larger than the sum of its proper divisors (882705345).

1385265855 is a wasteful number, since it uses less digits than its factorization.

1385265855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147750.

The product of its digits is 1440000, while the sum is 48.

The square root of 1385265855 is about 37219.1597836383. The cubic root of 1385265855 is about 1114.7505873660.

The spelling of 1385265855 in words is "one billion, three hundred eighty-five million, two hundred sixty-five thousand, eight hundred fifty-five".