1814085721 has 16 divisors (see below), whose sum is σ = 2089359360. Its totient is φ = 1542885120.

The previous prime is 1814085719. The next prime is 1814085731. The reversal of 1814085721 is 1275804181.

It is not a de Polignac number, because 1814085721 - 2¹ = 1814085719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1814085731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609525 + ... + 612493.

It is an arithmetic number, because the mean of its divisors is an integer number (130584960).

Almost surely, 2^1814085721 is an apocalyptic number.

It is an amenable number.

1814085721 is a deficient number, since it is larger than the sum of its proper divisors (275273639).

1814085721 is a wasteful number, since it uses less digits than its factorization.

1814085721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 1814085721 is about 42592.0851919696. The cubic root of 1814085721 is about 1219.6052025879.

The spelling of 1814085721 in words is "one billion, eight hundred fourteen million, eighty-five thousand, seven hundred twenty-one".