1712221641 has 27 divisors (see below), whose sum is σ = 2680616757. Its totient is φ = 1052681760.

The previous prime is 1712221639. The next prime is 1712221661. The reversal of 1712221641 is 1461222171.

The square root of 1712221641 is 41379.

It is a perfect power (a square), and thus also a powerful number.

1712221641 is a `hidden beast` number, since 1 + 7 + 12 + 2 + 2 + 1 + 641 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 88454025 + 1623767616 = 9405^2 + 40296^2 .

It is not a de Polignac number, because 1712221641 - 2¹ = 1712221639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1712221661) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1613251 + ... + 1614311.

Almost surely, 2^1712221641 is an apocalyptic number.

1712221641 is the 41379-th square number.

1712221641 is the 20690-th centered octagonal number.

It is an amenable number.

1712221641 is a deficient number, since it is larger than the sum of its proper divisors (968395116).

1712221641 is an equidigital number, since it uses as much as digits as its factorization.

1712221641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154 (or 1077 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The cubic root of 1712221641 is about 1196.3364286699.

The spelling of 1712221641 in words is "one billion, seven hundred twelve million, two hundred twenty-one thousand, six hundred forty-one".