1721066548 has 12 divisors (see below), whose sum is σ = 3013464132. Its totient is φ = 860076800.

The previous prime is 1721066537. The next prime is 1721066561. The reversal of 1721066548 is 8456601271.

It can be written as a sum of positive squares in 2 ways, for example, as 217798564 + 1503267984 = 14758^2 + 38772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1721066548.

It is a congruent number.

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, 105565 + ... + 120772.

It is an arithmetic number, because the mean of its divisors is an integer number (251122011).

Almost surely, 2^1721066548 is an apocalyptic number.

It is an amenable number.

1721066548 is a deficient number, since it is larger than the sum of its proper divisors (1292397584).

1721066548 is a wasteful number, since it uses less digits than its factorization.

1721066548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228242 (or 228240 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1721066548 is about 41485.7390918855. The cubic root of 1721066548 is about 1198.3928828655.

The spelling of 1721066548 in words is "one billion, seven hundred twenty-one million, sixty-six thousand, five hundred forty-eight".