1721164 has 12 divisors (see below), whose sum is σ = 3026800. Its totient is φ = 856368.

The previous prime is 1721149. The next prime is 1721183. The reversal of 1721164 is 4611271.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24 + ... + 1855.

2^1721164 is an apocalyptic number.

It is an amenable number.

1721164 is a deficient number, since it is larger than the sum of its proper divisors (1305636).

1721164 is a wasteful number, since it uses less digits than its factorization.

1721164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112 (or 2110 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 1721164 is about 1311.9314006456. The cubic root of 1721164 is about 119.8415501317.

The spelling of 1721164 in words is "one million, seven hundred twenty-one thousand, one hundred sixty-four".