1721475072 has 224 divisors, whose sum is σ = 5247802560. Its totient is φ = 557383680.

The previous prime is 1721475071. The next prime is 1721475101. The reversal of 1721475072 is 2705741271.

1721475072 is a `hidden beast` number, since 1 + 7 + 2 + 147 + 507 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1721475071) 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, 9510822 + ... + 9511002.

It is an arithmetic number, because the mean of its divisors is an integer number (23427690).

Almost surely, 2^1721475072 is an apocalyptic number.

1721475072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721475072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2623901280).

1721475072 is an abundant number, since it is smaller than the sum of its proper divisors (3526327488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1721475072 is an equidigital number, since it uses as much as digits as its factorization.

1721475072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The square root of 1721475072 is about 41490.6624675962. The cubic root of 1721475072 is about 1198.4876949117.

The spelling of 1721475072 in words is "one billion, seven hundred twenty-one million, four hundred seventy-five thousand, seventy-two".