1722560 has 56 divisors (see below), whose sum is σ = 4693920. Its totient is φ = 589824.

The previous prime is 1722557. The next prime is 1722563. The reversal of 1722560 is 652271.

It is an interprime number because it is at equal distance from previous prime (1722557) and next prime (1722563).

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×1722560³ = 15333607036059648000, which contains 333 as substring.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1722563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856 + ... + 2624.

It is an arithmetic number, because the mean of its divisors is an integer number (83820).

2^1722560 is an apocalyptic number.

1722560 is a gapful number since it is divisible by the number (10) 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 1722560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2346960).

1722560 is an abundant number, since it is smaller than the sum of its proper divisors (2971360).

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

1722560 is an equidigital number, since it uses as much as digits as its factorization.

1722560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 1722560 is about 1312.4633328211. The cubic root of 1722560 is about 119.8739416980.

The spelling of 1722560 in words is "one million, seven hundred twenty-two thousand, five hundred sixty".