1385104181 has 4 divisors (see below), whose sum is σ = 1385592864. Its totient is φ = 1384615500.

The previous prime is 1385104159. The next prime is 1385104219. The reversal of 1385104181 is 1814015831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1385104181 - 2²⁶ = 1317995317 is a prime.

It is a super-2 number, since 2×1385104181² = 3837027184447361522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385104151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240065 + ... + 245766.

It is an arithmetic number, because the mean of its divisors is an integer number (346398216).

Almost surely, 2^1385104181 is an apocalyptic number.

It is an amenable number.

1385104181 is a deficient number, since it is larger than the sum of its proper divisors (488683).

1385104181 is an equidigital number, since it uses as much as digits as its factorization.

1385104181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488682.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 1385104181 is about 37216.9878012716. The cubic root of 1385104181 is about 1114.7072182664.

The spelling of 1385104181 in words is "one billion, three hundred eighty-five million, one hundred four thousand, one hundred eighty-one".