1385046129 has 4 divisors (see below), whose sum is σ = 1846728176. Its totient is φ = 923364084.

The previous prime is 1385046107. The next prime is 1385046137. The reversal of 1385046129 is 9216405831.

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 not a de Polignac number, because 1385046129 - 2²⁵ = 1351491697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385046029) 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, 230841019 + ... + 230841024.

It is an arithmetic number, because the mean of its divisors is an integer number (461682044).

Almost surely, 2^1385046129 is an apocalyptic number.

It is an amenable number.

1385046129 is a deficient number, since it is larger than the sum of its proper divisors (461682047).

1385046129 is an equidigital number, since it uses as much as digits as its factorization.

1385046129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461682046.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1385046129 is about 37216.2078804383. The cubic root of 1385046129 is about 1114.6916449764.

The spelling of 1385046129 in words is "one billion, three hundred eighty-five million, forty-six thousand, one hundred twenty-nine".