1801256385 has 64 divisors (see below), whose sum is σ = 3132523008. Its totient is φ = 881362944.

The previous prime is 1801256377. The next prime is 1801256389. The reversal of 1801256385 is 5836521081.

It is not a de Polignac number, because 1801256385 - 2³ = 1801256377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1801256389) 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 63 ways as a sum of consecutive naturals, for example, 930879 + ... + 932811.

It is an arithmetic number, because the mean of its divisors is an integer number (48945672).

Almost surely, 2^1801256385 is an apocalyptic number.

1801256385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1801256385 is a deficient number, since it is larger than the sum of its proper divisors (1331266623).

1801256385 is a wasteful number, since it uses less digits than its factorization.

1801256385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1801256385 is about 42441.2109275878. The cubic root of 1801256385 is about 1216.7233550451.

The spelling of 1801256385 in words is "one billion, eight hundred one million, two hundred fifty-six thousand, three hundred eighty-five".