1385021147 has 4 divisors (see below), whose sum is σ = 1387842456. Its totient is φ = 1382199840.

The previous prime is 1385021117. The next prime is 1385021149. The reversal of 1385021147 is 7411205831.

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

It is a cyclic number.

It is not a de Polignac number, because 1385021147 - 2⁸ = 1385020891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385021149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409918 + ... + 1410899.

It is an arithmetic number, because the mean of its divisors is an integer number (346960614).

Almost surely, 2^1385021147 is an apocalyptic number.

1385021147 is a deficient number, since it is larger than the sum of its proper divisors (2821309).

1385021147 is an equidigital number, since it uses as much as digits as its factorization.

1385021147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821308.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1385021147 is about 37215.8722455890. The cubic root of 1385021147 is about 1114.6849430590.

Adding to 1385021147 its reverse (7411205831), we get a palindrome (8796226978).

The spelling of 1385021147 in words is "one billion, three hundred eighty-five million, twenty-one thousand, one hundred forty-seven".