1385785901 has 16 divisors (see below), whose sum is σ = 1472332800. Its totient is φ = 1302013440.

The previous prime is 1385785883. The next prime is 1385785939. The reversal of 1385785901 is 1095875831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1385785901 - 2⁶ = 1385785837 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385785001) 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, 686045 + ... + 688061.

It is an arithmetic number, because the mean of its divisors is an integer number (92020800).

Almost surely, 2^1385785901 is an apocalyptic number.

It is an amenable number.

1385785901 is a deficient number, since it is larger than the sum of its proper divisors (86546899).

1385785901 is a wasteful number, since it uses less digits than its factorization.

1385785901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684.

The product of its (nonzero) digits is 302400, while the sum is 47.

The square root of 1385785901 is about 37226.1453954072. The cubic root of 1385785901 is about 1114.8900669833.

The spelling of 1385785901 in words is "one billion, three hundred eighty-five million, seven hundred eighty-five thousand, nine hundred one".