1721474 has 8 divisors (see below), whose sum is σ = 2587788. Its totient is φ = 858880.

The previous prime is 1721453. The next prime is 1721477. The reversal of 1721474 is 4741271.

It can be written as a sum of positive squares in 2 ways, for example, as 1708249 + 13225 = 1307^2 + 115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1721477) 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 3 ways as a sum of consecutive naturals, for example, 1274 + ... + 2250.

2^1721474 is an apocalyptic number.

1721474 is a deficient number, since it is larger than the sum of its proper divisors (866314).

1721474 is an equidigital number, since it uses as much as digits as its factorization.

1721474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860.

The product of its digits is 1568, while the sum is 26.

The square root of 1721474 is about 1312.0495417476. The cubic root of 1721474 is about 119.8487446137.

The spelling of 1721474 in words is "one million, seven hundred twenty-one thousand, four hundred seventy-four".