1721466 has 32 divisors (see below), whose sum is σ = 3888000. Its totient is φ = 564480.

The previous prime is 1721453. The next prime is 1721477. The reversal of 1721466 is 6641271.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3610 + ... + 4058.

It is an arithmetic number, because the mean of its divisors is an integer number (121500).

2^1721466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944000).

1721466 is an abundant number, since it is smaller than the sum of its proper divisors (2166534).

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

1721466 is a wasteful number, since it uses less digits than its factorization.

1721466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 525 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1721466 is about 1312.0464930787. The cubic root of 1721466 is about 119.8485589605.

It can be divided in two parts, 1721 and 466, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1721466 in words is "one million, seven hundred twenty-one thousand, four hundred sixty-six".