1385402841 has 27 divisors (see below), whose sum is σ = 2115243039. Its totient is φ = 873651312.

The previous prime is 1385402827. The next prime is 1385402867. The reversal of 1385402841 is 1482045831.

The square root of 1385402841 is 37221.

It is a perfect power (a square), and thus also a powerful number.

1385402841 is a `hidden beast` number, since 1 + 38 + 540 + 2 + 84 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 322382025 + 1063020816 = 17955^2 + 32604^2 .

It is not a de Polignac number, because 1385402841 - 2⁹ = 1385402329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1385402796 and 1385402805.

It is not an unprimeable number, because it can be changed into a prime (1385403841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2121271 + ... + 2121923.

Almost surely, 2^1385402841 is an apocalyptic number.

1385402841 is the 37221-st square number.

1385402841 is the 18611-st centered octagonal number.

It is an amenable number.

1385402841 is a deficient number, since it is larger than the sum of its proper divisors (729840198).

1385402841 is an frugal number, since it uses more digits than its factorization.

1385402841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The cubic root of 1385402841 is about 1114.7873312613.

Multiplying 1385402841 by its sum of digits (36), we get a square (49874502276 = 223326²).

The spelling of 1385402841 in words is "one billion, three hundred eighty-five million, four hundred two thousand, eight hundred forty-one".