1722020825 has 24 divisors (see below), whose sum is σ = 2568793920. Its totient is φ = 1118664000.

The previous prime is 1722020819. The next prime is 1722020843. The reversal of 1722020825 is 5280202271.

It is not a de Polignac number, because 1722020825 - 2⁸ = 1722020569 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255626 + ... + 262275.

It is an arithmetic number, because the mean of its divisors is an integer number (107033080).

Almost surely, 2^1722020825 is an apocalyptic number.

It is an amenable number.

1722020825 is a deficient number, since it is larger than the sum of its proper divisors (846773095).

1722020825 is a wasteful number, since it uses less digits than its factorization.

1722020825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517937 (or 517932 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1722020825 is about 41497.2387635611. The cubic root of 1722020825 is about 1198.6143322663.

The spelling of 1722020825 in words is "one billion, seven hundred twenty-two million, twenty thousand, eight hundred twenty-five".