1721234853 has 48 divisors (see below), whose sum is σ = 2940065856. Its totient is φ = 996883200.

The previous prime is 1721234843. The next prime is 1721234861. The reversal of 1721234853 is 3584321271.

1721234853 is a `hidden beast` number, since 172 + 1 + 2 + 3 + 485 + 3 = 666.

It is not a de Polignac number, because 1721234853 - 2⁸ = 1721234597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721234843) 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 47 ways as a sum of consecutive naturals, for example, 37678 + ... + 69728.

It is an arithmetic number, because the mean of its divisors is an integer number (61251372).

Almost surely, 2^1721234853 is an apocalyptic number.

1721234853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1721234853 is a deficient number, since it is larger than the sum of its proper divisors (1218831003).

1721234853 is a wasteful number, since it uses less digits than its factorization.

1721234853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32096 (or 32084 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 1721234853 is about 41487.7675104361. The cubic root of 1721234853 is about 1198.4319456471.

The spelling of 1721234853 in words is "one billion, seven hundred twenty-one million, two hundred thirty-four thousand, eight hundred fifty-three".