1722016 has 12 divisors (see below), whose sum is σ = 3390282. Its totient is φ = 860992.

The previous prime is 1722013. The next prime is 1722029. The reversal of 1722016 is 6102271.

It can be written as a sum of positive squares in only one way, i.e., 1430416 + 291600 = 1196^2 + 540^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1721984 and 1722002.

It is not an unprimeable number, because it can be changed into a prime (1722013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26875 + ... + 26938.

2^1722016 is an apocalyptic number.

1722016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1722016 is a deficient number, since it is larger than the sum of its proper divisors (1668266).

1722016 is an equidigital number, since it uses as much as digits as its factorization.

1722016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53823 (or 53815 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1722016 is about 1312.2560725712. The cubic root of 1722016 is about 119.8613212783.

Adding to 1722016 its reverse (6102271), we get a palindrome (7824287).

The spelling of 1722016 in words is "one million, seven hundred twenty-two thousand, sixteen".