1721364 has 24 divisors (see below), whose sum is σ = 4078368. Its totient is φ = 564960.

The previous prime is 1721347. The next prime is 1721371. The reversal of 1721364 is 4631271.

It is a d-powerful number, because it can be written as 1 + 7⁴ + 2¹⁵ + 1 + 3⁸ + 6⁸ + 4² .

It is a congruent number.

It is an unprimeable number.

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, 267 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (169932).

2^1721364 is an apocalyptic number.

It is an amenable number.

1721364 is an abundant number, since it is smaller than the sum of its proper divisors (2357004).

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

1721364 is a wasteful number, since it uses less digits than its factorization.

1721364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215 (or 2213 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 1721364 is about 1312.0076219291. The cubic root of 1721364 is about 119.8461918318.

The spelling of 1721364 in words is "one million, seven hundred twenty-one thousand, three hundred sixty-four".